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Michael Phelps of the United States swims during the men's 200m butterfly final at the Beijing 2008 Olympic Games in the National Aquatics Center, also known as the Water Cube in Beijing, China, Aug. 13, 2008. Phelps set a new wolrd record and won the gold medal in the event with 1 minute 52.03 seconds. (Xinhua/Chen Kai) 

Michael Phelps of the United States swims during the men's 200m butterfly final at the Beijing 2008 Olympic Games in the National Aquatics Center, also known as the Water Cube in Beijing, China, Aug. 13, 2008. Phelps set a new wolrd record and won the gold medal in the event with 1 minute 52.03 seconds. (Xinhua/Chen Kai)