"Where there is demand, people will find supply. So how do we stop the demand?"
After winning a gold medal in 2000, Anthony Ervin retired from swimming and auctioned off his medal before hitting rock bottom. Years of depression, suicide, drugs and hopelessness led him down a path of destruction. Now, 35, Ervin has overcome even the worst of his demons as he leads the 2016 U.S. Swim team in Rio de Janeiro.