Sawirada Cayaaraha Olombikada ee London

North Korea's Kim Un Hyang competes in the women's 10-meter platform diving preliminaries at the Aquatics Centre in Olympic Park during the 2012 Summer Olympics Wednesday, Aug. 8, 2012, in London. (AP Photo/Charlie Riedel)

APTOPIX London Olympics Rhythmic Gymnastics

Jamaica's Usain Bolt competes in a men's 200-meter semifinal during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Wednesday, Aug. 8, 2012. (AP Photo/Ben Curtis)