Olympic champion Liu Xiang walks away after failing to start his 110 metres hurdles first-round heat of the athletics competition at the Beijing 2008 Olympic Games, August 18, 2008. After one false start Liu stopped before the first hurdle clutching his leg and then walked out of the stadium. (Agencies)

China's Xiang Liu retires from the first round of the men's 110m hurdles at the "Bird's Nest" National Stadium during the 2008 Beijing Olympic Games on August 18, 2008. [Agencies]
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