Lashawn Merritt of the U.S. puts ice on his left leg after failing to finish his men's 400m heat during...
Lashawn Merritt of the U.S. puts ice on his left leg after failing to finish his men's 400m heat during the London 2012 Olympic Games at the Olympic Stadium August 4, 2012. REUTERS/Lucy Nicholson (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS)
