Lance Armstrong, in the yellow leader's jersey, during the 2002 Tour de France. Now, there's no winner of that race or the six others in which he finished first. Mike Powell/Getty Images hide caption

itoggle caption Mike Powell/Getty Images

Former cyclist Scott Mercier has gained notoriety for refusing to go on a doping program 15 years ago. Here, Mercier (in blue jersey) rides just ahead of cyclist Chris Horner in 1997. Jed Jacobsohn/Getty Images hide caption

itoggle caption Jed Jacobsohn/Getty Images

Lance Armstrong, in the leader's yellow jersey, during the 2001 Tour de France. Patrick Kovarik /AFP/Getty Images hide caption

itoggle caption Patrick Kovarik /AFP/Getty Images

Lance Armstrong competes in the Rev3 Half Full Triathalon Sunday in Ellicott City, Md. Armstrong joined other cancer survivors in the event, which raised funds for the Ulman Cancer Fund for Young Adults. Steve Ruark/AP hide caption

itoggle caption Steve Ruark/AP

United States Anti-Doping Agency Chief Executive Officer Travis Tygart, right, during a subcommittee hearing on drug use in sports in 2008. Susan Walsh/AP hide caption

itoggle caption Susan Walsh/AP

Lance Armstrong, wearing the yellow jersey that identifies the leader in the Tour de France, during the race in 2003. He won that year and six other times. Joel Saget /AFP/Getty Images hide caption

itoggle caption Joel Saget /AFP/Getty Images

Lance Armstrong grimaces prior to the start of the third stage of the Tour de France cycling race in Wanze, Belgium, on July 6, 2010. Armstrong said Thursday he is finished fighting charges from the U.S. Anti-Doping Agency that he used performance-enhancing drugs during his unprecedented cycling career. Christophe Ena/AP hide caption

itoggle caption Christophe Ena/AP