(Image credit: Flickr user Great Beyond)1. Betty RobinsonAt the 1928 Olympic Games in Amsterdam, Betty Robinson, a 16-year-old student from Riverdale, Ill., won a gold medal in the 100-meter dash and a silver medal as part of the 100-meter relay team. But her most impressive athletic achievement would come eight years later, when she staged one of the greatest comebacks in sports history.In 1931, Robinson was flying in a small biplane with her cousin when they crashed near Chicago. After she was pul...