If kratom helps opioid addicts, why might DEA outlaw it?

The national epidemic of opioid abuse has claimed more than 300,000 lives in the U.S. over the last 16 years -- and some researchers claim that kratom, an herbal psychoactive drug that is currently unregulated, could help people struggling with addiction. But federal drug policy-makers may classify kratom as an illegal drug. NewsHour Weekend Special Correspondent Mike Taibbi reports.