Photos | 2012 London Olympics, a look back
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Credit: Getty Images
WASHINGTON, DC - SEPTEMBER 14: U.S. President Barack Obama speaks as U.S. Olympic Flag Bearer Mariel Zagunis (L) looks on during a South Lawn event to welcome the 2012 U.S. Olympic and Paralympic teams September 14, 2012 at the White House in Washington, DC. Vice President Joseph Biden and first lady Michelle Obama join the president to host the athletes to honor their participation and success in this year�s Olympic and Paralympic Games in London. (Photo by Alex Wong/Getty Images)
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