U.S. sprinter Tyson Gay

Associated Press
United States' silver medal winner Justin Gatlin, United States' Tyson Gay, Jamaica's gold medal winner Usain Bolt, United States' Mike Rodgers and United States' bronze medal winner Trayvon Bromell, from left, compete in the men's 100m final during the World Athletics Championships at the Bird's Nest stadium in Beijing, Sunday, Aug. 23, 2015. (AP Photo/Mark Schiefelbein)

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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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