A former teammate of perhaps the world's greatest cyclist, Lance Armstrong, says he used banned performance-enhancing substances with Armstrong to cheat in pro races, including the Tour de France, the sport's ultimate event.
For the first time, former Armstrong teammate Tyler Hamilton reveals details to Scott Pelley never heard in public before of how and when he and some of the former members of the U.S. Postal Service team led by Armstrong used banned substances, including EPO and testosterone, to gain an advantage in races that Armstrong won.
Hamilton's interview is part of a six-month investigation by "60 Minutes" into doping on the cycling circuit and whether Armstrong has used banned substances - which he has steadfastly denied - a matter now under federal investigation.
The Pelley team's report will be broadcast on "60 Minutes" Sunday, May 22 at 7 p.m. ET/PT.