BEIJING, CHINA - AUGUST 23: (L-R) Michael Tinsley of the United States, Nicholas Bett of Kenya and Leford Green of Jamaica compete in the Men's 400 metres hurdles semi-final during day two of the 15th IAAF World Athletics Championships Beijing 2015 at Beijing National Stadium on August 23, 2015 in Beijing, China. (Photo by Cameron Spencer/Getty Images)
