Lance Armstrong says the fallout began in October 2012, shortly after the U.S. Anti-Doping Agency stripped him of his Tour de France wins. He lost sponsorships worth tens of millions of dollars from corporations like Nike and Anheuser-Busch. Then, Lance says, came the lowest moment. Watch as he tells Oprah why stepping away from his foundation, Livestrong, was the hardest.
More from Oprah's exclusive interview with Lance Armstrong