'Lance Armstrong Injected EPO', Ex-Teammate Tyler Hamilton

Tyler Hamilton, a former teammate of Lance Armstrong, told "60 Minutes" that he used performance-enhancing drugs with the seven-time Tour de France winner to cheat in cycling races, including the tour.

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. visit source 'Lance Armstrong Injected EPO', Ex-Teammate Tyler Hamilton: