One man who has displayed amazing perseverance in recent years is Lance Armstrong, the two-time defending champion of the Tour de France, the premier cycling race in the world. Armstrong had to overcome cancer in the year before he won his first race, undergoing chemotherapy and radiation treatments. This did not, however, derail him from achieving his goals. He came back from the cancer (which he was given a 20% chance of beating) stronger than ever. Armstrong now has his sights set on an Olympic gold medal.