**FILE** United States' Claressa Shields reacts Aug. 8, 2012, after defeating Kazakhstan's Marina Volnova in a women's middleweight semifinal boxing match at the 2012 Summer Olympics in London. (Associated Press)
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**FILE** United States' Claressa Shields reacts Aug. 8, 2012, after defeating Kazakhstan's Marina Volnova in a women's middleweight semifinal boxing match at the 2012 Summer Olympics in London. (Associated Press)
