Olympics: Day 15

Associated Press
From left, United States' 4x100-meter relay team Trell Kimmons, Justin Gatlin, Tyson Gay and Ryan Bailey walk on the track taking the silver medal during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 11, 2012. (AP Photo/Matt Dunham)

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Highlights of the day's competition at the London 2012 Olympic Games.

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