From left, United States' Michael Phelps, United States' Conor Dwyer, United States' Ricky Berens and United States' Ryan Lochte pose with their gold medals for the men's 4x200-meter freestyle relay swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Tuesday, July 31, 2012. (AP Photo/Mark J. Terrill)
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