(L-R) Nicholas Bett of Kenya, Kerron Clement of the U.S., Jeffrey Gibson of the Bahamas, Denis Kudryavtsev of Russia and Michael Tinsley of the U,S, compete in the men's 400 metres hurdles final at the 15th IAAF World Championships at the National Stadium in Beijing, China August 25, 2015. Bett won. REUTERS/David Gray