China's Su reaches 100m final

Athletes (from L to R) Levi Cadogan of Barbados, Akani Simbine of South Africa, Mike Rodgers of the US, Justin Gatlin of the US, Aaron Brown of Canada, Femi Ogunode of Qatar, Nickel Ashmeade of Jamaica and Chijindu Ujah of Britain compete at the start of the heat 2 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]