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May 28, 2016

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Michael Phelps leaps at the start of a 50-meter freestyle preliminary heat during the Arena Grand Prix swim event, Friday, April 25, 2014, in Mesa, Ariz.

Matt York / AP

Michael Phelps leaps at the start of a 50-meter freestyle preliminary heat during the Arena Grand Prix swim event, Friday, April 25, 2014, in Mesa, Ariz.