CCTV News: Olympic swimmer Sun Yang failed drug test

According to China Anti-Doping Agency, the country’s most successful swimmer Sun Yang tested positive for a banned stimulant back in May. Sun has already served the three-month ban earlier this year and has been stripped of his 1500-meter freestyle gold that he won at the national championship. But many are wondering why the announcement came six months after the failed test? Check this video for more details.