Jamaica's Usain Bolt (top L), Yohan Blake (bottom L), Nesta Carter (top R) and Michael Frater pose next to their new world record of 36.84 seconds after winning the men's 4x100m relay final at the London 2012 Olympic Games at the Olympic Stadium August 11, 2012. REUTERS/Kai Pfaffenbach (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS TPX IMAGES OF THE DAY)