Inside Twin Tower's Structure and the 911 Attack - Original World Trade Center
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- Опубліковано 10 тра 2022
- The Twin Towers, which official name were 1 World Trade Center and 2 World Trade Center, were the tallest in the world from 1971 - 1973. On September 11, 2001, the two buildings got attacked by 2 hijacked Boeing 767, and later collapsed. 2977 people were killed. That was a very tragic day for the United States of America.
- Фільми й анімація
You answered more questions in 4 minutes than nearly any other full-length documentary I’ve seen about 9/11.
You beat me to it, I was thinking the same thing. Explains perfectly how the buildings failed and makes total sense
Propaganda
Good bot. You served your purpose
@@JustForRita good bots/ shills
The building collapses were not shown
I’ll never forget this day! I was in 2nd grade and my elementary school was on 77th street in Manhattan. I was 10 minute drive from the towers! I just remember my name being called on the loudspeaker telling me to go to the main office. My dad picked me and my sister up. I’ll never forget seeing both towers on fire while driving uptown. My grandfather worked in the tower and he overslept that day and didn’t go to work. We were all blessed to be alive still.
wow im trully thankful he slept in
Geez Bro! Hope you're ok today.... that's alot to absorb in Yr2!! I seen in live on TV in Sydney.. I had just left the Army & wanted to rejoin to go kick some butt in Afghanistan!
wow that is great your grandfather made it out. i was 22 and in London, with my dad and sister both in Manhattan, i remember calling them for hours to make sure they were ok but all the phone lines were blocked all day. but one thing: 77th street from WTC is a lot longer than 10min esp with NYC traffic!!
@@fernfunk I’m glad you and your family made it out as well! And you can make it down there in 10 minutes without traffic, I’ve done it before. I was speeding but I did it lol. with traffic of course not hop on the westside highway and you’ll be there quick
Damn the goverment nearly killed your poor grandpa
This high quality video finally answered two important questions. 1 Why they collapsed. 2 Why people trapped in the upper floors never had a chance to escape. I can still visualize the second Boeing hitting the south tower.
An excellent longer documentary was made with more detail about the fireproofing on the steel beams and trusses and how they weakened with the heat. They interviewed the original architects and engineers. I believe you can find it on YT.
@@user-xi7gz6sz4w I lived in Seattle for most of my life. The original architect also designed the IBM building in downtown Seattle. Same design.
You never had those questions. you pretend being a "bad conspiracy theorist" who "found the correct path". This video answers nothing and repeats the typical "jet melted fuel steel beams" narrative.
@@marble25 Not melted, just weakened to the point of failure. Relax.....
You could figure out all that in 20 years? Damn! you mentally challenged.
22 years later & I still can’t believe this happened 😢 rest in peace to all
I was in a plane that had explosions
i still cant believe it
@@victormelendez2124 I was in a plane that had explosion
@@jewishtelabib3728 what how was the found out ? Did you let her later found out???
@@victormelendez2124 I jump in pont of new york
The smartest man was in the second tower who insisted his office evacuate, even though they hadn't been hit...that guy needs more press.
The smartest people left without provocation from others as soon as the first plane hit.
The smartest man will be the owner and his sons. He doesn't go to work, after attending all days. It's lucky or a smart person?
I hope those who prevented any evacuation from happening rot in hell
@@CarlosGonzalez-fh9sl Well they call him Lucky Larry for a reason!
@@MIS315 Who was preventing evacuation? I've never heard of such a thing
The story with the third staircase in the South Tower is sad. Even though it wasn’t blocked - it had some debris and flames in it that made it look blocked/dangerous to most people. Only 5 people managed to realize it was still passable (one of them actually called the police & told them about it twice before the collapse, but in the chaos the information got lost). The other survivors who managed to survive above the impact zone were in the Skylobby, which was directly where the plane hit. So it was below where the stairs falsely appeared blocked. There were hundreds of people in the lobby, and 14 who survived the plane hitting & were uninjured enough to move managed to escape.
Um, I think you have some errors in your information. The South Tower was hit between floors 78 and 84, so the Skylobby was the lowest point of the South Tower's impact zone. Those fourteen survivors you're referring to were at the lowest point of the impact, not above it; and most were severely injured from the plane's impact. There were three survivors from the offices of Euro Brokers on the 84th floor and one survivor from the offices of Fuji Bank that was rescued by one of the survivors from the Euro Brokers office. I've studied 9/11 for 16 years and am familiar with the impact survivors' stories. I do not know anyone who survived the impact in the Skylobby that was not severely injured, because every survivors'story I heard from the Skylobby stated the severe injuries they sustained. Pretty much the only person I know who wasn't severely injured was Kelly Reyher. Also, who is this survivor you're referring to that called police and told them about the stairway?
@@cfinigan5092 That’s exactly what I said? The Skylobby was at the point of impact, not above it. And so Staircase A didn’t seem falsely blocked. The 14 who managed to escape were from those not badly injured enough to be unable to walk/move.
Brian Clark and Stanley Praimnath claim to have called 911 on the 31st floor. One of the things they claim to have mentioned was that they took Stairwell A down and it was clear.
@@HW-sw5gb OK, it sounded like you were saying that the Skylobby was above the point of impact. Also, Clark was actually calling to report a serious casualty on the 44th floor Skylobby. They ran into a security guard watching over a semiconscious man with serious head injuries and the guard told them to get a medic and stretcher to the 44th floor, and that's what Clark was calling 911 for. I heard the audio of the call and I don't think he mentioned anything about Stairway A being passable through the point of impact.
@@cfinigan5092 Okay, I think I found the article where I remember hearing it from
“The phones were working in Oppenheimer's offices on the 31st floor. Clark was on the telephone for over three minutes and talked to three different people before his 911 call was understood. This call might have been the only chance for rescue workers to learn that there was a clear stairwell that the several hundred people trapped above the impact could try to use to escape. ”
@@HW-sw5gb Yeah, the information regarding Stairway A is debatable, because we know Orio Palmer was able to make it up to 78 via Stairway A, however I've read articles saying the transfer corridor on the 82nd floor caught fire at some point, rendering the stairway impassable. Whether that happened is still up in the air and we may never know as the towers fell but I remember reading things and hearing eyewitness accounts that Stairway A was only passable to a certain point through the impact zone before eventually becoming impassable.
It took 20 years for me to understand how this happened unbelievable. You explained it perfectly
Sarkasm Off😉
Been watching lots of 9/11 videos past few days. This is the only one that showed locations of stairwells in relation to the impact. Makes it easier to understand the people getting trapped, and why some were able to escape through one remaining stairwell. Well done.
My greatest fear is hanging out of a window on the 105th floor and slipping or getting pushed out of the window. My biggest fear is falling from heights. I've had nightmares of this.
Same
When I'm near the window, it seems to me that someone is bout to push me out of there. This is a very scary feeling, cuz of which I'm afraid of heights.
It is a very scary thought, but you likely wouldn't feel any pain. And if you did, it would go away very quickly. Falls from such a height are not usually survivable and usually result in instant death. There have been very rare occasions where people have survived falls from extraordinary heights. Part of me thinks that those people that jumped experienced relief from the heat and smoke and hopefully were at peace.
@@revokdaryl1 No way. You absolutely would feel pain from a fall like that. But you'd likely be dead within a split second so it wouldn't matter.
I had a nightmare where I fell from mount everest. Absolutely terrifying.
I have watched many videos about what happened physically to the Towers upon impact, and I gotta say this is the first time I saw a clear and concise illustration that helped me to visualize accurately. You answered all the questions I ever had. Thanks much for this video
It was a set up Demolition
Yes this was well done but not completely accurate. There were no columns in the core or otherwise that melted. Temperatures were not high enough to melt steel. They were high enough to cause even those massive steel columns to lose as much as 90% of their strength though and that is what caused the collapse.
Once the floor trusses succumbed and dropped, leaving the Outer Perimeter Column Wall without lateral support for a long enough span and those columns reached critical temperature, they folded like knees dropping that enormous building section above just 2 to 5 stories, hammering the structure below with 12 times the force it could withstand and initiating an unstoppable "global" collapse.
It was a horrible and tragic day but absolutely nothing unexplainable or untowards happened on 9/11.
Once those aircraft struck, a total collapse was imminent and those that understood the WTC Tower construction knew it.
Never forget what they did to us and why.
RIP to all those lost and God bless their loved ones and God bless America.
@@holdernewtshesrearin5471thank you for your informative reply.
@@YallaMiami - brilliant, numb- knuts, Just brilliant. And there were SEVEN buildings in the WTC complex that were destroyed and quite a few others.
But how could you possibly know that? It's not like that info is at our fingertips.
And btw. Atleast acquire a physics education before spouting off about what can or can't occur, sport. You come off sounding ignorant and arrogant, like a, well, like a "truther".
@@YallaMiamiwrong. Fire don't melt steel.
Not matter how much you think it does
I was 35 when this happened. I wept on and off for two weeks following the attacks. The shock of it all, changed me forever. A profound sadness that only those old enough to understand the enormity of what happened that day can understand.
Yeah I was 18 when it happened. And I feel totally different about the day now at 40. I didn’t have the maturity then to fully grasp what was happening.
@@__rm307 I'm 19 and still can't believe what happened that day and thereafter. Truly catastrophic. Unbelievable. The fact that I wasn't even alive when this occurred makes it even more unreal to me. Fiction almost. Knowing that myself and the victims of 9/11 ceased to exist is a strange thought indeed. Regardless, it's the only thing that relates us.
@@__rm307 I was 16 and the whole event didn't even phase me at the time. I was not and still am not shocked that this could happen, when before 9/11 we still had in recent memory stuff like the previous WTC bombing, the OKC city bombing, also the Unabomber. All had the common theme of terrorism, which made 9/11 just not all that shocking for me. However I didn't truly understand the scale of the destruction of 9/11 at that time, even after hearing the casualty reports that were coming out. For some reason it was years later before I really started to grasp how bad it was and the enormity of the whole thing, and learned even more details about the events of that day.
I was 12 sad day
ua-cam.com/video/UIGBMTXpwH4/v-deo.html&ab_channel=JustBrowsing
It's important to note the steel columns didn't "melt" but instead were weakened by the prolonged, intense heat from the fires, and thus lost their strength and ability to support the massive building-sized weight above them. Once the building-sized weight above the weakened columns dropped onto the main building below, the massive inertia force was unstoppable, and the building floors pancaked all the way to the ground. Nice job on the video.
Also the truss floor gave way first under the heat, pulling on the weaker outside facade and thous leading to the way the outside wall was pulled in before colapsing.
He literally said that in the video
Did u see recent China skyscraper whole building on fire whole day long, didn’t collapse. People are so easy to be convinced by something nonsense.
@@ironnads7975 No, he said the steel "melted" in the video. It didn't.
There is no way the mass of 15% of the building pancaked the other 85% of the building. Explain the explosions multiple stories below the "pancaking" and the fact all 3 building fell at free fall speeds. The 85% of the building that wasn't damaged till the top 15% fell on it would have at the least slowed the destruction and in the popping of thousands of structural engineers would not have destroyed the entire building. It take mass not inertia to destroy something. That mass was destroyed by the time the top half of the build was gone.
Also how does aluminum airplane skin cut through steel 75x thicker than it? Also without leaving anything on the outside of the building?
Nice presentation!
One correction 3:43 There's actually no evidence of any steel columns melting; they were heated very hot & weakened substantially, but did not melt.
Its just an educated guess
It is the all too common problem of an overly liberal and imprecise use of "melted".
well either way the beams still became weak and weren’t able to hold the upper floors
Correct.
Besides, jet fuel was only a minor factor.
The major factors were:
1) A giant 2 story hole at the sides of each building. 30% structural support is compromised.
2) The upper weight of the building V.S the compromised impact zone with a giant 2 story gaping hole.
3) Weight redistribution is compromised. The area with the hole needs to redirect and shift the weight load towards the core.
4) Jet Fuel had already evaporated since initial explosion during impact so there is no more jet fuel anyway.
5) Fire is fueled by the office furniture, aluminum from the plane and other metals and other debris.
6) The continuous heat even at a fluctuating 1200 to 1500 degrees was still warm enough to weaken, warp and bend 0.25 inches of steel column (upper columns were 0.25 inch steel shell slabs) holding up 10s of thousands of tons of weight over the impact area with the hole.
Note: The "molten steel" dripping off the towers were molten glass and other metals "cooking" inside of the furnace where the planes exploded.
they werent very hot. it was a kerosene fireball that disappeared in seconds then had air cooling
You gave a clear explanation of what happened to the buildings, and why one of the stairwells in the South tower remained available. Thank you!
No explanation at all
Just regurgitated propaganda😂
Just accept the fact that the Jet Fuel in these 2 planes was the strongest and most powerful jet fuel that our history witnessed!
It was able to knock down not just 2 steel frame structures, it actually knocked down 3 of them! And on top of that 2 if these buildings fully pulverized and vanished.
Then it kept on burning for 100 days after the collapse.
It was so powerful it simply broke all Physics Laws
@@YallaMiami It was so powerful it broke physics laws LMFAO
That's the dumbest thing I've read in a looong time and you win🏆
😂😂😂
@@YallaMiami jet fuel doesn’t need to melt the steel, it just needs to heat it up to the point where it becomes more flexible. Heat also makes steel expand and contract like crazy. That’s what caused the collapse, not sure why that is so hard to understand with you people. I’m a welder and work with hot steel everyday I know exactly how this works. If you don’t know what you’re talking about you should simply not say anything at all.
@@Savagebab Larry Silverstein would love your argument 😂.
The towers literally pulverized and you still arguing that 2 planes did that.
This was very straightforward and to the point, with useful animations. I've watched many, many hours-long documentaries that didn't include everything you did here. Great work.
Thank you for showing this and describing it. I always wondered what these building looked like and where the stairwells and elevators were.
Oh my god. I feel so bad for the people who died in the elevators
Same here.
I remember watching all this live never will forget it
@@jessealbertson8187 unjust Karna I'm afraid
Some people in elevators survived, surprisingly
@@MikehMike01but what about when it the building collapse
As others have said, you answered the main questions about the integrity of the building and in a very concise way. Many people don't realize there was an intact stairwell in the South Tower that could have been used to escape. It's sad that more survivors above the impact zone didn't realize this. I'm only one, but have subscribed - they all add up.
There was smoke in that staircase and people turned back to look for another way out. The Man with the Red Bandana gives pretty good background on that stairwell.
@@mryett You believe what you want to believe regardless of evidence to the contrary. You're an excellent example of 'confirmation bias' Watch Brian Clark's account available on UA-cam. A 9/11 Survivor's Story - Brian Clark
ua-cam.com/video/UIGBMTXpwH4/v-deo.html&ab_channel=JustBrowsing
People please obey God's Ten Commandments otherwise you will be judged soon as well😢
One of the survival stories from south tower says that people were exiting down one of the stairwells and were about 5 floors below the crash zone so where was all the jet fuel gushing down the stairs on top of them ? obviously most of the fuel blew straight out of the opposite side of the buildings in both cases.
I was there in 2001 (August) and I'm still looking at these videos today..
Sadly, with one stairwell open the people above the impact zone thought they were trapped when they really weren’t. A few survivors made it past the impact zone. And one firefighter went up the stairs past the impact zone.
How to save their lives?
Step 1: I have to tell George W. Bush because he wants to see my old video talking about what's happening on 9/11, but I use a VHS Camcorder instead of an iPhone.
Step 2:
Towns and Pentagon must close from 5:00 AM to 3:00 PM on September 11, 2001.
Step 3:
The immediate military will cause terrorists in Iraq after World Trade Center is destroyed.
Step 4: Invent a Time Machine
@@juan1256robloxiphone? It was 2001 they didn’t exist
@@maxd4968 No I said VHS Camcorder instead of iPhone
Awesome video. I don’t even know how I found this but I’m glad I did. Loved the diagram showing how the stairwells were cutoff and how the building steel melted. Excellent video.
He didnt show how they melted. Jet fuel cannot melt steel.
This is as much info as I’ve gotten from 10 other video’s separate, thank you for explaining so well
This is an excellent video and explains things I hadn’t seen elsewhere. Thank you.
Bruh I recently watched a video about people calling their families to say goodbye, or even having panic attacks on their phone while in a call. And moments after, when the tower collapsed, you could hear their terror before the line cut off. I actually started crying after hearing them....
Demolition blues
Very well made video. You packed a lot of useful informations in less than 5 minutes. Impressive.
This is the most amazing and enlightening presentation of what happened to the structures. Thank you for making this. You are very talented.
it was a noob decision to build the towers vertically. if they had put the twin towers horizontally, many lives would have been saved
umm stop online hate pls. be rispectful on line. u are leser than most pls get educate@@imbetterthanu-gi9ej
I will never forget still having to go to a luncheon work meeting that day when we knew we were under a terrorist attack and didn't know what else was to happen. On my way home from work that day I was still in shock and saw people just behaving normally, mowing grass, jogging etc and I couldn't understand it. I cried for at least 3 months straight. TY for explaining this.
When I left work that day (I was in midtown,) I took metro north home. It was maybe 4pm (they wouldn’t let us leave earlier,) and there were maybe only two other people in the train car with me. It was eerily quiet. It was numbing.
today is september 11 2022, man RIP to the people who died that day
Your a day early.
Great animation, especially cause we don't really have good video of the first crash, so this makes the perspective available to us.
@Jake Korol lmao god bro, get a life
@@mattmammone2338 I was 5 blocks away in class, flight 11 went right over our school. It sounded like the loudest car crash ever. We all thought it was a car crash on west st (only cause we couldn't have imagined it was a plane crash into a building). Comingnout of class and looking at the north tower burning was the most incredible thing I ever seen in my life.
Most well made video on this horrible attack. This probably is one of very few videos that keeps new generations informed on what really happened that terrible day.
Even those of us on other continents were traumatized by that day.
I remember coming home from school early because it was such a sunny and warm September day. Just getting ready for supper. We always had the TV on, and then an emergency new update. The first tower had already been hit. Then only a while after we saw I live.
I remember walking outside and in complete disbelief just felt numb. When realizing people were stuck it just became a mental torture. But we were glued to the tv. It felt involuntary.
The whole world felt this day.
Then came the response.
Thanks for the animations, explained a lot.
May all Those Souls Rest In peace.😥
Terrorist including?
Thanks for doing this. We relive this almost every day. The towers' beauty also led to their failure.
Very historic.
This is the government's explanation, nothing new here. Beauty is in the eye of the beholder. The tower's "beauty" had nothing to do with its "failure". The building was engineered to withstand an airplane crash & that's on video btw.
@@shechshire it was engineered to even withstand over 4 plane crushes
@@Smile-ux6pm "engineered to" Oh so when they constructed them they knew that boeing 767's weighing up to 400,000 pounds, going 530 mph, and storing 90,000 Litres of jet fuel could hit the buildings at the worst locations and stay standing? Also a fun fact: "engineered to" doesn't mean guaranteed results in any way.
@@shechshire They were designes to withstand a 707 going at a cruising speed, not a 767 going over 300+ mph
Your video is clearly the best model demonstrating the towers' construction techniques & how they were compromised during the 911 attack. Simply excellent work!
Only that it doesn't follow physics principles... Only a controlled demolitions explain how it could colapse that way.
@@joseppurroy6978 show us video of all these explosions going off at each time stamp pin pointing the floors it happened on, since there were constant cameras all over these towers I’m sure you’ll have no problem finding a video where you can clearly see where the explosions went off. Oh wait, you probably will say you can’t it’s a “I heard it from Facebook so I agree with it”. You don’t know physics, shut up kid lol
you are E.D.ot...want some animation for it?
you are not using your brain. how did building 7 collapse in free fall also without jet fuel. how many steel building models have u seen fall freely to melted steel?
@@joseppurroy6978says probably some random kid on the internet who thinks he’s a master engineer
Awsome video bro keep up the good work.
I loved it straight to the facts no taking for 30 mins etc and made the building understandble thanks man 👍
I'll never forget watching this on live TV. Seeing that 2nd plane hit is permanently etched in my mind. I was in 2nd grade then. I don't remember alot from 2nd grade but I'll always remember this.
Same bro! I was in 2nd grade also and I was in NYC to see it live! My elementary school was on 77th St in Manhattan so I was a 10 minute drive from the towers. My dad picked me and my sister up from school when the first plane hit. I’ll always remember seeing both towers on fire while driving home.
I was also in 2nd grade. I'm from upstate New York, and while I live a few hundred miles from the city, it's haunting to think that the events of 9/11 happened so close to home.
i was in second grade as well…watching that live south tower hit was devastating, the look on my teachers face knowing this was not an accident. scary…We’re by Detroit, In michigan and they still evacuated us and sent us all home. We didn’t know what was next after this and the pentagon.
@@Doctrinedarkk thats powerful man. Thanks for sharing
That rendition is quite amazing, considering what I witnessed.
I didn't see the first plane, except for the replays from the news, but within moments of watching it... I watched as the 2nd plane collided. I was 20 and in the Army. The part that sticks with me the hardest, was watching people jump to their deaths, knowing there was no way down and a fire will soon consume them. You don't realize at first what you were seeing, but then when it hits you what's happening live... people just leaping to their known deaths.
I remember a good part of life, with the Twin Towers. In movies, video games... it was as New York as The Statue of Liberty.
Watching them fall that day... gave many Americans a PTSD, that Pearl Harbor didn't give. Watching Live, as our country felt seemingly under attack. From unknown sources, for an unknown amount of time. I'll never forget that day, as long as I live. I'll remember it as if it happened a week ago.
"The part that sticks with me the hardest, was watching people jump to their deaths, knowing there was no way down and a fire will soon consume them."
I've often thought about that over the years. I can't even begin to imagine the horror those people were faced with, when making a conscious decision to jump was the better option.
I feel really sorry for you and every American.
4 minutes is not enough!!! the VISUALS make this soooo interesting to look at!!!! i hope you create much much more like these
Always found it interesting how the tower that fell first was the one that was hit last. I came up with some reasons for this myself. I am not a structural engineer or anything, but here are some of my own thoughts.
South tower was hit more at an angle and destroyed the corner of the building taking out both supporting walls which significantly degraded the strength of the structure as well as possibly taking out more floors causing more weak spots.
Also being hit slightly lower than north tower leaving more weight above the impacted floor causing the weakened support beams to hold up more weight and allowing it to give out sooner. It appears the explosion was greater in the second impact causing more fires to weaken the structure quicker.
Just some thoughts I had.
I hit twice as low, on the side, and was traveling considerably faster.
Yes, asymmetric hit results in asymmetric damage.
Yes, lower hit results in more mass above the damage area acting on the damaged area.
Also, higher impact velocity in the South Tower = more energy at impact.
@MackeyBigBoy4014 Sorry to sound sarcastic, but no kidding.
@@cavok1984 although, if the buildings hadn’t collapsed, would they have been repairable? With the amount of jet fuel and massive fires other than the structure damage, it appears it would have been very costly to repair. What are your thoughts on this?
@@patricknedz that's something that I have wondered myself. Obviously, towers like like these are built to last and in very crowded cities like New York, demolition would be very hard to do I imagine?
Very well made and informative video. Showing the design of the buildings in a quick model
Great vid man been waiting for this one
I was 11 years old, and to this day I always look in the sky when I hear a plane fly over. I didn’t realize why I did that until one day I thought about it… and it is because of 9/11. I remember being scared of hearing planes fly over head when I was young, and now it’s just a habit to look up.
even, i do look up in the sky everytime a plane passes through!
or you might just be more aware of your surroundings.
I was 18 when this happened and was always looking up at planes or helicopters long before 9/11, and I still do.
@@Randomadventureswithpaul Because bush is still alive
An incredible explanation and illustration of what happened to the buildings and their inevitable collapse.
You are truly an expert in presentation and production.
This was surely the darkest day in the history of terrorism.
RIP to all the innocent victims of 9/11.
Clear, short and straight to the point with no dilly dallying. Thank you this answered my questions about how they stayed standing for so long after the planes hit
The worst tragedy in my lifetime. I remember, I couldn’t believe it was happening.
Tragedy that was worse is when y’all killed 1M Iraqis
@@fortnitemove9834 Who is y’all? I didn’t kill anybody. But yeah the people that were killed in Iraq that was a tragedy too.
@@KevinMahomboy I means as in america and patriotic Americans who were like puppets of bush.
And it isn’t a “tragedy too” it was like a 166 9/11s in terms of civilian casualties
@@fortnitemove9834 Not really trying to have back in forth. Let’s just say the whole time period was tragic and a lot of people lost their lives, which is a very bad thing. I witnessed this first hand, that was my point. Not trying to draw a what’s worst equivalency. “For me” 9/11 hits a little different when your personally blocks away in Harlem. My experience isn’t everyone’s, it’s just how I experienced, that particular day.
@@KevinMahomboy ah ok I get you. Well, you’re honestly right. Arguing and just going back and forth does nothing but leave everyone pissed so I’m honestly just gonna respect your opinion and say I was in the wrong.
Have a great day dude!
R.I.P Twin brothers.
Towers*
lol
@@volkova6209 ah yes, laughing at a tragedy which killed 2000 and counting. Who hurt you?
@@theebloxinator lol
@@spookyispoggg do you have no heart or are you the ever living f**k just outright have no emotions
It's incredible they held for as long as they did given the insane structural damage.
Yeah, very poorly designed to withstand it.
Dang imagine if someone was in an elevator going down from that floor when the planes hit. That would of been scary to see it happen.
Truely. One of the most scariest ways to die
This was really well done and I learned a lot
Very good video! Excellent on the commentary, facts, and animation!
ROTTEN VIDEO OF LIES
I remember my husband phoning me from work - we're in the UK! He was a lecturer and was in the college's library watching the events unfold on the TV. Still sends shivers down my spine to think of it!
Great job with this vid. Sub’d
Great video...and true also. This is why tower 2 fell first. It was hit at a lower point, thus the weight above the impact point is greater.
It also hit at an angle, so not only did it take out the exterior columns of the tube structure on the side it hit, but the right wing cut through more colums on the east side.
@Bagenius: It also caused a very large explosion
@@matthewcollie6936 Ummm, both planes caused a very large explosion in both towers. Great observation, Sherlock.
@@isaachannigan920 it kinda did if you look closely at the upper part of the south tower just as it started to fall, you can see it tilt to the side quite significantly before the dust and debris cloud got big enough to obscure it
@@isaachannigan920 gravity most likely
Very well done !! Concise and fact based. This was a horrific day for everyone. RIP all those lost. Forever remembered !!
Remember them.
FACT BASED ?
@@MrDaiseymay Yes, FACT BASED. Not based on conspiratard conjecture and nonsense.
@@MrDaiseymay Repeating the"facts" well !. They said half fell and pancaked the lower half. It's "science" One second able to support a thousand tons, next second support nothing. All 3 buildings just happened to fall in their own footprint at freefall speed. Just a coincidence that it's never happened before or since to a steal frame building to fail due to fire......... Only a fool would ask questions .....
@@nebtheweb8885 Repeating the"facts" well !. They said half fell and pancaked the lower half. It's "science" One second able to support a thousand tons, next second support nothing. All 3 buildings just happened to fall in their own footprint at freefall speed. Just a coincidence that it's never happened before or since to a steal frame building to fail due to fire......... Only a fool would ask questions .....
Such a great video explaining the attack you did!!
Very respectfully done. Subscribed~
Great video & it was really informative & thank you for posting it.
f off robot. lone wolf.
Very impressive video... VERY few people thought the whole building would collapse after the initial impact ... Probably thought it was so big that it would not collapse. Weak floor trusses sealed the fate of the building. A chain is only as strong as the weakest link.
Thank you for this video.
I did.
Your wrong it was a controlled demo your only saying that because the government and the media told you it was hijacked planes that brought down wtc.
it had nothing to do with weak floor trusses as your forgetting resistance when one floor hits the the other it slows down not maintain or gain speed it goes against physics. the buildings were 110 storeys so it should of took roughly 110secs to collapse but it took 10-12 secs that's 10 storeys a second are being destroyed thats impossible without explosives. theres plenty of testimony of massive explosions going off all over the towers way before both collapses..
@@acostin4004 - Your explanation is incorrect. Indeed, you have it exactly backwards.
Collapse initiation mechanisms are in fact visible to the naked eye. The sagging floor trusses can be seen. They were photographed. We can also see the inward bowing of perimeter columns by up to 5 feet until they buckle. When those perimeter columns buckle is when the collapse begins, when the mass above starts to drop. As it does so it transitions instantly from a static load to a dynamic load 30 times greater.
Thousands of tons of debris falling through the open office space is going to come crashing down on the top intact floor. That floor is not designed to take anything like that kind of load. Only the weight of people and furniture that would normally occupy that floor. The two 5/8" bolts at each end of each floor truss instantly shear and the floor fails, ADDING ITS MASS TO THE ALREADY FALLING MASS.
This process keeps repeating all the way down until there is nothing left. As the falling mass increases, its momentum increases and the rate of collapse also increases. We know it increases. It can and has been measured. The data has been published.
Like I said, you got it exactly backwards.
All of that has fuck-all to do with who did 9/11, how or why and thus is true no matter who did 9/11, how or why.
This dogma you have come to accept as gospel that it had to be pre-planned (never understood why it had to be "controlled") demolition, so that way it can't be terrorists is Chimpanzee-part-of-the-brain (non) thinking.
And no one looks good flinging poop.
I sincerely hope this helps.
You keep telling yourself that.
Physics 101
Asymmetric damage = Asymmetric failure
A very simple explanation that I've not been able to find in dozens of videos.
I can’t handle this still. Excellent video, thanks.
Only critique I have is how you described some of the steel beams had "Melted" due to the heat. This is not the case because the heat from the fire was never hot enough to melt the steel. It did however soften the steel at around 750°c causing structural integrety to weaken beyond hold.
He did not mean it in the literal sense and I agree the term is too loaded to use casually.
@@MFitz12 Oh my poor little liar, he even visualized the melting...
@@HirnExehow would you visualize weakness in a still intact structural beam?
@@bioswalesbioswales3004 Why do you ask that stupid question? It´s not about beams nor about weakness, it´s about CORE COLUMNS being MELTED, that is what is SAID AND VISUALIZED in the video.
@@HirnExe because melting and weakness are two different and misleading things. im not saying it wasn’t causal but i am saying that there is a way to visualize melting and a way to visualize weakness onset by long exposure high intensity heat. i asked it because i thought the visualization was a very good way to show that the structure was compromised in a way that didn’t necessarily mean melting
Very well presented
I was shopping in Covent Garden London watching it unfold through the window of a TV store. Crowds gathered in the street, we couldn’t believe our eyes. Madness!
Very interesting, thanks for the video . I always feel so much for everyone who lost their lives and families friends and everyone involved in that day . Such a sad day .
Every time I see a video of the engineering of the towers and their construction. I'm amazed at how fragile they were .
Oh yes they always build giant buildings to be fragile you didn't know that.
Whenever they show the collapse they leave out the forty seven columns in the concrete vault. I'm to assume those just melted away as well. Even though all the steel used in high rise construction is incased in a thick coating of high heat insulation. Oh yes and buildings always just deteriorate at free fall speed.
The moon is also made of cheese.
Make sure you take all your shots for the virus.
yes, very fragile when compared to bombs
well nobody ever imagined a 767 loaded with fuel smashing right theough them at very high speed, so in my opinion, they were not that fragile at all.
@@anastege11 by the way, if i am not wrong, they said that the twin tower could sustain a boeing 707 crash?
@@michaelowenchandras Looks like they were wrong.
3:43 A thing worth pointing out is that the steel didn't need to melt in order to buckle. It loses strength way before that point, which was enough to make the buildings collapse.
The whole reason the "jet fuel doesn't melt steel beams" conspiracy floats around is because of the misconception that steel needs to melt in order to structurally fail in the first place. It doesn't. In fact, you'd be surprised how "low" of a temperature is enough to weaken it. Unfortunately, this simple error caused an entire conspiracy theory to lead its own life.
-edit-
This comment inevitably opened the can of worms called conspiracy theorists. If you are reading this and are interested in how 9/11 happened from a honest curiosity, I do warn to be cautious to tread in the realm of conspiracy theories. If you simply look at this comment section and see the difference between how they react opposed to those that aren't, there is a visible hatred visible. Don't aspire to be like them for your own mental health- and personal relationship's sake. Unfortunately every day, more and more people fall victim to the conspiracy rabbit hole, so please use caution dealing with them if this concept is new to you.
Actual truth is openly debatable. Conspiracy theories claim absolute truth in a religious fashion, and daring to state otherwise will result in personal attacks. It is important to realize that just because people bark loud, it don't mean they are right. It is also important to remember that 9/11 is merely one of the many vessels that carry conspiracy theories. The subject doesn't matter since all the arguments for all conspiracy theories are the same. Hence why the uprise of Qanon manages to flawlessly tie everything and anything together. From 9/11 to the Titanic switch theory, to the moonlanding, to pizzagate.
If you are currently in a bad place in life, feel hopeless about the future or perhaps afraid of how current times are, then that's ok. But please talk to someone about this. Preferrably to a psychologist. Do not seek comfort in conspiracy theories, for the only thing they offer is a sense of comfort at the cost of all your relationships and own mental health.
I think "jet fuel doesn't melt steel beams" theory comes from severe brain damage of the individual ; - )
Something like 500 degrees to soften up, around 1200 to melt. The fires in the Twins were around 8-900 degrees and the initial explosion wiped out most of the fireproofing foam leaving just bare steel.
@@pawel1545 can't even spell
Do not get me wrong. But if WTC buikding 7 also collapsed, without even being hit. I start to believe those conspiracies you know? I’m a human being. Can’t control my thoughts and feelings and criticism.
@@hahahahahah5355 Sure. There actually was a time I found it believable too. But one of the most important things to realize when it comes to basically anything in life is that no event is black and white. With that I mean to say that a lot of people are quick to make the assumption that it must've been an inside job because these were massive buildings. And they sure were, but they weren't solid steel. In fact, a photo of the sun shining through the towers shows how humble of a core there actually was inside the towers. In the end, a building like the old Trade Center is nothing more than a collection of girders and other parts that engineers once thought would be good way to stick together. But when you see the massive damage inflicted on both towers as well as WTC 7's south side, and even the Deutsche Bank building which had to be demolished later, it is no surprise that it all came down.
I'd recommend reading the book "City in the Sky", which is a fascinating account on the inception of the WTC, how they were built, the politics involved, and what mistakes in their design played a massive role in their demise, and what features prevented the tragedy from turning bigger. And it also describes why the Empire State Building withstood a planecrash, being of a far more robust design. It will help understand how many factors were involved in how that fateful day played out.
Excellent explanation and model!
Thank you so much for this video. Clear information with great visuals.
You believe cartoons?
@@malachi- Shoo truther, don’t bother me.
Good video! Very informative sine when it happened I was young
intelligent adults at the time didnt take long to work out it was an inside job
Thank u this was interesting
Probably the best documentary I’ve seen
Great video with a lot of information. It's a sad topic but important to be remembered.
I feel sorry for those who lost their lives from that event. 😢
Us too.
i feel sorry for the ones who survived the original impact not the ones who lost their lives in a split second!
i couldn't image the horrors of knowing there is no escape....
Jesus is not watching you
Impressive video of the tragedy. Still hard to believe it happened, but nearly miraculous the buildings fell as they did instead of the tops toppling over and destroying many more buildings and killing even more on the ground. From what I can understand, these buildings were a victim of their unusual design. If that plane had crashed into the Empire State building it almost certainly would not have collapsed. Or many other buildings more traditionally constructed. If only they had fully evacuated the second building that was hit, The people above the point of impact would have survived. As terrible as it is, must remember that the vast majority of people did safely exit the buildings, though no comfort for the loved lines of the victims.
"unusual design" - are you really that gullible?
It wasn’t miraculous, it was by design. The towers were engineered to fall into their own footprint
A plane did hit the empire state building. A b29 in 1946 or something
If plane hit burj Khalifa will it collapse?
Still very hard to believe that it not only crushed the steel below it. But did so at FreeFall speed. Amazing
Very well done video. Thank you
Thank you for explaining.
I was 13 years old when this happened and i still remember it clear as day
Seeing people jumping from windows was chilling to see
Not all jumped. When the smoke and heat inside got too much some folks clung to the cladding outside the building, but they could only hold on for so long.
My heart goes out to all the victims. RIP❤❤❤❤❤
Very great video!
This was very insightful and informative, Great video 👍👍
That's the best animation of how the towers were built and why they ultimately collapsed. If you understand the basic logic as to how they were designed, then it makes sense why they collapsed straight down. The load bearing was done by the exterior walls and central column, it's not a grid structure like most buildings where the weight is equally spread throughout. In this case, the exterior walls were the weaker of the two load bearing structures because they werent encased in reinforced concrete like the central column. As the fires softened the exterior walls and the floor trusses, the floors began to sag and then started the pull the exterior walls inward. Eventually I think a couple floors just gave way between the sustained heat AND the weight of the collapsed floors from the initial explosion. As they began to collapse and rip off their mounts from the exterior walls, they pulled in the exterior wall just far enough to also fail, then with the weight of 30-40 floors still above it, they also buckled and that's when the whole thing starts to come down. The reason in my opinion it came straight down is because as the floors collapsed, the exterior walls effectively became detached from the rest of the building, and so it basically just "slid" down the central column which was made of steel reinforced concrete. When you watch the collapse of both towers, you can see windows exploding a few floors below the mushroom as it comes down. I believe thats actually the floors collapsing ahead of everything else and as they pancake onto each other, its forcing a huge amount of air through the windows which looks like mini explosions. That's my opinion on the whole thing anyways....
Just to clarify, there was no reinforced concrete anywhere in the twin towers above ground level, including the central core which was entirely made of structural steel.
The only concrete on each level was 4"-thick non-reinforced concrete flooring poured, and this was the source of the dust. The walls of the stairwells were made of sheetrock.
I hope this channel takes office, also mind blowing ka-booming video!
Du hast vergessen die Sprengkörper mit rein zu simulieren.
Aber sonst klasse Aufklärung.
Wow, I wasn't even born when that happened.
I was 18 that year. Seems like yesterday only, but that was 22 yrs ago already. How time does pass!!
Thank you for letting us know.
Well done animation. What explanation do you have for why the buildings collapse vertically and don't fall over to one side?
Because that's how they're structured, every floor that colapses brings more weight with it meaning that at some point it's too heavy to tilt. And the foundations we're damaged and weak so even a little weight was enough
@@mateuszmateuszowy Thank you for the explanation. What is the reason why all connections and load-bearing elements on each floor give way AT THE SAME TIME? The impact only destroyed a small part of the floors, so why should the others collapse? And why does everything (steel and concrete) turn to dust?
It would be logical to me that the upper part of the building would tilt because only part of the statics would be affected and not all of the supporting elements at the same time.
@@ESJO-jw5zx 1. The heat from the fire made the foundation weak. 2. The twin towers had outdated design that basically meant it had one load-bearing pillar instead of a bunch, which meant that if a floor were to colapse it would take everything down with it. As for concrete, well it does turn into dust when crushed, it's remains and the mentioned steel were obviously at ground zero where it took 8 months to clean them up. What actually happened is it DID fall at an angle. What I think you are asking is why it fell straight down. Well that's because the building was held up from the outside. The exterior attempted to keep holding it up, but it just got crushed by the enormous uneven weight on top, the dust kind of covers this fact but you can see it slightly tilt, it just didn't fall but instead it "pancaked". TL;DR The bad design coupled with the weight of the floor resulted in this collapse
@@mateuszmateuszowy Thank you for the detailed answer and the constructive discussion.
However, the arguments don't convince me.
As you say in the video, 47 steel beams were installed inside the towers. Steel becomes elastic at 800 degrees Celsius, and the fire lasted at a maximum of 500 degrees. The heat during the explosion was not enough to destabilize or melt the steel.
The dust. OK. the concrete crumbles into dust, and the steel?
In 2015, several explosions occurred in the port area of Tianjin. Tens of fires broke out and destroyed everything.
If you look at the pictures of the port area after the fire, you can see that the steel structures of the buildings are still standing. Or the fire in Madrid in February 2005. Here an office tower burned for 24 hours. Quote: "By midday, only the completely bent steel frame was still standing on the top floors. ... The flames had at times reached temperatures of up to 800 degrees, reported fire chief Javier Sanz. ... In the meantime, the prefect Constantino Méndez declared that the danger of collapse had been averted be." Source: Spiegel from February 13, 2005
In both China and Spain, the steel structures withstood the devastating fires. Fires that lasted much longer and generated much more heat than the fires in the Twin Towers.
What explanation do you have for why the steel structure of the twin towers turned to dust, while in Tianjin and Madrid the steel withstood the fire?
This was good, simple, and to the point! It answered a lot of questions I wondered about that none of the documentaries even covered. Good Job - thank you!
Damn the aim was pretty good
The outer "skin" of the towers also acted as part of the structure. That being damaged by the crashes contributed to the upper sections collapsing. This is likely why the upper sections first tilted towards the crash area as the collapse began.
wrong. the buildings were designed to stand with the core only. they were designed to survive a 707 crashing into the facade.
@@Cjephunneh
1) The cores were also damaged, this is why very few people could escape from above the plane strikes.
2) There were claims that the towers could survive a plane strike, but this was under the assumption that the plane would have very little fuel onboard and flying slow. This was the scenario when the Empire State and 40 Wall St buildings were hit by planes. The planes were lost in the fog and trying to find a runway to land on. The planes that hit the twin towers were flying fast and still had most of their fuel load.
Both collapses occurred away from the impact point. The antenna on the North Tower (hit on the north face) tilted south and South Tower (hit on the south face at more off an offset) tilted northeast.
they did survive the crash it was the burning that made them fall. also fuel and materials only burn at a certain temp but the wind up there that day was about 15 to 20 mph steady adding fuel to those fires. like blowing on your camp fire trying to get it going, but dont take breaths just keep blowing for 30 minutes strait. @@Cjephunneh
@@Cjephunneh - which a 767 and a lot bigger, More fuel to burn etc.
For the age that both towers had one would've thought they would come crashing down as soon as the plane hit. They stood tall for a long time even after the first hits and the fire spreading like crazy. Smart engeneering at the time.
man I love this 4 minute trailer.
Short, straight to the point, but still in depth. Thank you.
This was so informative and well made
Y’all act like the buildings were indestructible
Concerned because of a case where an airplane hit the Empire State Building, Skilling's people did an analysis that showed the towers would withstand the impact of a Boeing 707.
"Our analysis indicated the biggest problem would be the fact that all the fuel (from the airplane) would dump into the building. There would be a horrendous fire. A lot of people would be killed," he said. "The building structure would still be there."
[...]
"However," he added, "I'm not saying that properly applied explosives - shaped explosives - of that magnitude could not do a tremendous amount of damage."
[...]
"I would imagine that if you took the top expert in that type of work and gave him the assignment of bringing these buildings down with explosives, I would bet that he could do it."
SOURCE: Seattle Times
John Skilling was chief engineer in the construction of the Twin Towers.
Very informative - thank you
Outstanding presentation!
Actually one person survived that entire area that was destroyed
Who?
@@YzuAiha Skrillex
It’s so terrible and truly heartbreaking for the family’s who lost loved ones. Hopefully the world can learn from this and that it won’t happen again
How are you going to say the "the world"? When it was the usa who should learn from this
@@Blizz247 what should they learn from? That some cowards hijacked two planes and killed thousand of innocent people who had no involvement whatsoever ? Oh so that’s fine but saying that this shouldn’t happen again is not? F off bro
It won’t, most likely.
@@Blizz247yes
Well they didn't learn from it. They had it coming and made worse.
There was a mall directly underneath tower 1 and tower 2. It was a key point in some people surviving the attacks as they were able to use it to shelter from falling debris as they went to escape. The whole mall was destroyed when the towers collapsed. But the statues and That's All Folks sign from the Warner Bros. studio store survived and is now in the 9/11 museum
Thank you. I never knew there was still a stairwell available