1 / 12

Britain's Dwain Chambers celebrates after finishing first in his men's 100m round 1 heats at the London 2012 Olympic Games at the Olympic Stadium

Britain's Dwain Chambers celebrates after finishing first in his men's 100m round 1 heats at the London 2012 Olympic Games at the Olympic Stadium August 4, 2012. REUTERS/Dylan Martinez (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS TPX IMAGES OF THE DAY)