China's Sun Yang defends 800m freestyle title at worlds (4/8)

China's Sun Yang claimed the gold medal of the men's 800m freestyle at the World Swimming Championships at the Sant Jordi arena in Barcelona on July 31, 2013. Sun finished with 7:41.36. He has now won two gold medals in this World Championship meet in Barcelona as he won gold in the 400 meter freestyle on Sunday. [Photo/Osports]