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Michael Phelps

Gold medallist Michael Phelps of the United States exits the pool after the United States won the Men's 4x100m medley Relay Final on Day 8 of the London 2012 Olympic Games at the Aquatics Centre on August 4, 2012 in London, England. (Photo by Clive Rose/Getty Images)

A look back at the London Olympics

Yahoo Sports

A look at some of the most memorable photos from the London 2012 Olympics. -- By Carla Thorpe, Yahoo! Sports