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Japan’s high-school student Akihiro Yamaguchi reacts after winning the men’s 200-meter breaststroke in a new world record time at the national games in Gifu on September 15, 2012. Japan’s 18-year-old Akihiro Yamaguchi clocked two minutes 7.01 seconds, breaking the previous world mark of 2:07.28 set by Daniel Gyurta of Hungary on August 1 at the London Olympics. (Getty Images)

Japan’s high-school student Akihiro Yamaguchi reacts after winning the men’s 200-meter breaststroke in a new world record time at the national games in Gifu on September 15, 2012. Japan’s 18-year-old Akihiro Yamaguchi clocked two minutes 7.01 seconds, breaking the previous world mark of 2:07.28 set by Daniel Gyurta of Hungary on August 1 at the London Olympics. (Getty Images)