Matthew Josa of the United States competes during the Men's 100m Butterfly heats at the 13th FINA World Swimming Championships(25m) in Windsor, Ontario, Canada, Dec. 7, 2016. (Xinhua/Zou Zheng)
Matthew Josa of the United States competes during the Men's 100m Butterfly heats at the 13th FINA World Swimming Championships(25m) in Windsor, Ontario, Canada, Dec. 7, 2016. (Xinhua/Zou Zheng)
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