Jamaica's Usain Bolt celebrates his win in the men's 4 x 100-meter 

Jamaica's Usain Bolt celebrates his win in the men's 4 x 100-meter relay final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 11, 2012. Jamaica set a new world record with a time of 36.84 seconds.(AP Photo/Anja Niedringhaus)
Associated Press
Jamaica's Usain Bolt celebrates his win in the men's 4 x 100-meter relay final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 11, 2012. Jamaica set a new world record with a time of 36.84 seconds.(AP Photo/Anja Niedringhaus)
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