U.S. sprinter Tyson Gay

Associated Press
From left, Tyson Gay from the USA, Justin Gatlin from the USA and Asafa Powell from Jamaica compete in the men's 100m race at the Athletissima IAAF Diamond League athletics meeting in the Stade Olympique de la Pontaise in Lausanne, Switzerland, Thursday, July 9, 2015. (Valentin Flauraud/Keystone via AP)

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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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