Gold medal winner, Jamaica's Shelly-Ann Fraser-Pryce, left, crosses the finish line ahead of silver medal winner United States' Carmelita Jeter during the women's 100-meter final during athletics competition in the Olympic Stadium at the 2012 Summer Olympics, Saturday, Aug. 4, 2012, in London. (AP Photo/Rebecca Blackwell)
Jamaica's Shelly-Ann Fraser-Pryce celebrates winning gold in the women's 100-meter final during the athletics competition in the Olympic Stadium at the 2012 Summer Olympics, Saturday, Aug. 4, 2012, in London.(AP Photo/David J. Phillip)
South Africa's Oscar Pistorius competes in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/Matt Dunham)
In this photo taken with a fisheye lens, United States' LaShawn Merritt walks in the infield after pulling out with an injury from a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/David J. Phillip)
United States' Carmelita Jeter gestures after competing in a women's 100-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 3, 2012. (AP Photo/Martin Meissner)
United States' Reese Hoffa competes in the men's shot put final during the athletics competition in the Olympic Stadium at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/David J. Phillip)
United States' Reese Hoffa competes in the men's shot put final during the athletics competition in the Olympic Stadium at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/David J. Phillip)
United States' Carmelita Jeter gestures after competing in a women's 100-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 3, 2012. (AP Photo/Martin Meissner)
Poland's Tomasz Majewski makes an attempt in the qualification for the men's Shot Put during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 3, 2012. (AP Photo/Matt Dunham)
