Sun Yang of China sets world record in 1,500 freestyle

China's Yang Sun prepares to swim in a men's 400-meter freestyle heat at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics. (July 29, 2012) Credit: AP
Sun Yang of China broke his own world record to win the men's 1,500-meter freestyle at the London Olympics on Saturday.
Sun clocked 14:31.02 seconds in the marathon-like race, slicing 3.12 seconds off his mark from last year's world championships in Shanghai.
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