Jamaica's Usain Bolt, center, reacts after winning ahead of United States' Justin Gatlin, right, and Britain's Dwayne Chambers in the men's 4x100-meter relay final at the World Athletics Championships... more 
Jamaica's Usain Bolt, center, reacts after winning ahead of United States' Justin Gatlin, right, and Britain's Dwayne Chambers in the men's 4x100-meter relay final at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Sunday, Aug. 18, 2013. (AP Photo/Martin Meissner) less 
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Associated Press | Photo By Martin Meissner
Sun, Aug 18, 2013 3:13 PM EDT