Lauryn Williams (L) of the United States competes again with the lost baton during the women's 4x100m relay first round at the National Stadium, also known as the Bird's Nest, during Beijing 2008 Olympic Games in Beijing, China, Aug. 21, 2008. (Xinhua/Liao Yujie)

Tyson Gay (Front) of the United States lost the baton during the men's 4 x 100m relay first round at the National Stadium, also known as the Bird's Nest, during Beijing 2008 Olympic Games in Beijing, China, Aug. 21, 2008. (Xinhua/Yang Lei)