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China's Sun Yang reacts after his victory. (Christophe Simon/AFP/Getty Images)

China’s Sun Yang reacts after his victory. (Christophe Simon/AFP/Getty Images)

China’s Sun Yang reacts after he took gold in the men’s 1500m freestyle final during the swimming event at the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / CHRISTOPHE SIMONCHRISTOPHE SIMON/AFP/GettyImages