U.S. sprinter Tyson Gay

Associated Press
FILE - In this June 23, 2013, file photo, Tyson Gay runs to the finish line to win the senior men's 200-meter dash final at the U.S. Championships athletics meet in Des Moines, Iowa. Gay failed more than one drug test this year, recording one of his positives at the U.S. championships, where he won the 100 and 200 meters in June, The Associated Press learned on Friday, July 26, 2013. (AP Photo/Charlie Neibergall, File)

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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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