United States' Allyson Felix leads teammate Sanya Richards-Ross and Jamaica's Veronica Campbell-Brown to win the women's 200-meter final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Wednesday, Aug. 8, 2012. (AP Photo/Anja Niedringhaus)
United States' Allyson Felix leads teammate Sanya Richards-Ross and Jamaica's Veronica Campbell-Brown to win the women's 200-meter final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Wednesday, Aug. 8, 2012. (AP Photo/Anja Niedringhaus)