U.S. gymnast McKayla Maroney performs during the artistic gymnastics women's vault final at the 2012 Summer Olympics, Sunday, Aug. 5, 2012, in London. (AP Photo/Gregory Bull)

Associated Press
U.S. gymnast McKayla Maroney performs during the artistic gymnastics women's vault  final at the 2012 Summer Olympics, Sunday, Aug. 5, 2012, in London. (AP Photo/Gregory Bull)
U.S. gymnast McKayla Maroney performs during the artistic gymnastics women's vault final at the 2012 Summer Olympics, Sunday, Aug. 5, 2012, in London. (AP Photo/Gregory Bull)
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