United States'  Allyson Felix celebrates her win in 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/Martin Meissner)

Photo by: Martin Meissner

United States' Allyson Felix celebrates her win in 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/Martin Meissner)