It's not doping that wins races, Sun says - it's lots of hard work

China's Sun Yang reacts after he wins gold in the men's 1,500m freestyle final in world record time at the Aquatics Center of the London Olympic Games on Saturday. Sun clocked 14 minutes, 31.02 seconds. "This is the event I most wanted to win, and all my effort paid off at this moment," he said. Cui Meng / China Daily