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Paul Elbert Hamm is a retired American artistic gymnast and member of the United States men's national artistic gymnastics team. He is the 2004 Olympic all-around champion, a three-time Olympic medalist, and the 2003 World all-around champion. Hamm is the most successful American male gymnast in history, one of only two American gymnasts to win the all-around title at both the Olympics and the World Championships, and the only male American gymnast to do so.