Photos: US 2012 Olympians to watch
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Credit: Getty Images
IRVINE, CA - AUGUST 20: Michael Phelps swims on his way to winning the men's 100m butterfly during the Mutual of Omaha Pan Pacific Championships at the William Woollett Jr. Aquatic Center on August 20, 2010 in Irvine, California. (Photo by Stephen Dunn/Getty Images)
