Kerron Clement of the U,S. competes in the men's 400m hurdles heat during the London 2012 Olympic Games...
Kerron Clement of the U,S. competes in the men's 400m hurdles heat during the London 2012 Olympic Games at the Olympic Stadium August 3, 2012. REUTERS/Lucy Nicholson (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS TPX IMAGES OF THE DAY)