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The Associated Press

United States swimmer Michael Phelps dives off of the starting block during the men's 400-meter individual medley event during the 2012 Summer Olympics at the Aquatics Centre in London on Saturday, July 28, 2012, in London. (AP Photo/Al Bello, Pool)

Showdown between Lochte and Phelps

Lochte vs. Phelps in the men's 400-Meter Individual Medley.