Usain Bolt of Jamaica celebrates after the men's 200m final at the National Stadium, also known as the Bird's Nest, during Beijing 2008 Olympic Games in Beijing, China, Aug. 20, 2008. Usain Bolt of Jamaica won the title with 19.30 seconds and set a new world record. (Xinhua/Guo Dayue)

Usain Bolt of Jamaica jubilates after the men's 200m final at the National Stadium, also known as the Bird's Nest, during Beijing 2008 Olympic Games in Beijing, China, Aug. 20, 2008. Usain Bolt of Jamaica won the title with 19.30 seconds and set a new world record. (Xinhua/Guo Dayue)