Jan Veleba of Czech Republic, Dwain Chambers of Britain, Lerone Clarke of Jamaica, his compatriot Usain Bolt, Kim Collins of Saint Kitts and Nevis and Darvis Patton of the U.S. (L-R) compete in the 100 meters men's race at the IAAF World Challenge Ostrava Golden Spike meeting in Ostrava May 25, 2012.
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