China's Su reaches 100m final

Athletes (from L to R) Su Bingtian of China, Usain Bolt of Jamaica, Jak Ali Harvey of Turkey, and Henricho Bruintjies of South Africa compete at the start of their heat of the men's 100 metres semi-final during the 15th IAAF World Championships at the National Stadium in Beijing, China, August 23, 2015. [Photo/Agencies]