BEIJING - AUGUST 18: Liu Xiang of China walks off injured in the Men's 110m Hurdles Heats at the National Stadium on Day 10 of the Beijing 2008 Olympic Games on August 18, 2008 in Beijing, China. (Photo by Getty Images)
BEIJING - AUGUST 18: Liu Xiang of China walks off injured in the Men's 110m Hurdles Heats at the National Stadium on Day 10 of the Beijing 2008 Olympic Games on August 18, 2008 in Beijing, China. (Photo by Getty Images)