Team USA soccer player Mia Hamm was one of the most popular and successful female athletes in American history.
Mia Hamm interacts with fans during the Kickoff Challenge at the Dannon "Live Your Active Culture" booth at the San Diego County Fair in Del Mar, Calif. (June 21, 2011)
David Robinson and Mia Hamm look on during the Opening Ceremony of the 2009 U.S. Open. (Aug. 31, 2009)
Mia Hamm attends the 9th Annual USTA Serves OPENing Gala at the USTA Billie Jean King National Tennis Center.
Former NBA basketball player David Robinson, center right, hugs former tennis player Andre Agassi as former quarterback Doug Flutie, left, and former soccer player Mia Hamm stand nearby during the opening-night festivities of the U.S. Open tennis tournament in New York, Monday, Aug. 31, 2009. (AP Photo/Charles Krupa)