Pilots Before vs After The Bulletproof Door

What many younger viewers might not know, is that after the 9/11 terroristic attacks, flight decks of all passenger planes got an upgrade. A simple cockpit door was replaced by a massiv bulletproof door which since then is always locked. Many things, in a good or bad way, have been much more casual before, but that has found a sudden end... Like funny and philosophic stories about aviation? Just subscribe to out channel and get a dose of flying humor.