Allyson Felix of the U.S. competes in her women’s 200m semi-final during the London 2012 Olympic Games at the Olympic Stadium

by

Allyson Felix of the U.S. competes in her women's 200m semi-final during the London 2012 Olympic Games at the Olympic Stadium

Allyson Felix of the U.S. competes in her women’s 200m semi-final during the London 2012 Olympic Games at the Olympic Stadium August 7, 2012. REUTERS/Eddie Keogh (BRITAIN – Tags: SPORT OLYMPICS SPORT ATHLETICS)