At the height of his career, Lance Armstrong was one of the greatest athletes in the world—and one of its greatest heroes. He defeated testicular cancer after being given less than 50 percent odds of beating it, only to emerge as a cycling powerhouse, winning a record seven Tour de France titles. But doping allegations that dogged his superman run finally reached a crushing breaking point on Aug. 24, when the U.S. Anti-Doping Agency stripped him of his medals and banned him from the sport for life, claiming to have definitive proof that he doped throughout his career. Here, a timeline of Armstrong’s many ups and downs.