U.S. sprinter Tyson Gay

Associated Press
United States 4x100-meter relay runner Ryan Bailey, right, leaps in the air as he walks with teammates as Tyson Gay and Trell Kimmons, left, look on during the athletics in the Olympic Park during the 2012 Summer Olympics, Saturday, Aug. 11, 2012, in London. (AP Photo/Jon Super)

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After a lackluster performance at the 2008 Beijing Olympics, American sprinter Tyson Gay will be looking for redemption on the track at the London Games. -- By Armando Botello II

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