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BEIJING, CHINA - AUGUST 22: Usain Bolt of Jamaica waves to the crowd before competing in the Men's 100 metres heats during day one of the 15th IAAF World Athletics Championships Beijing 2015 at Beijing National Stadium on August 22, 2015 in Beijing, China. (Photo by Andy Lyons/Getty Images)

BEIJING, CHINA - AUGUST 22:  Usain Bolt of Jamaica waves to the crowd before competing in the Men's 100 metres heats during day one of the 15th IAAF World Athletics Championships Beijing 2015 at Beijing National Stadium on August 22, 2015 in Beijing, China.  (Photo by Andy Lyons/Getty Images)