U.S. Vice President Joe Biden, left, and Republican vice presidential candidate U.S. Rep. Paul Ryan participate in the vice presidential debate at Centre College in Danville, Kentucky, on Oct. 11, 2012. Photographer: Rick Wilking-Pool/Getty Images
U.S. Vice President Joe Biden, left, and Republican vice presidential candidate U.S. Rep. Paul Ryan participate in the vice presidential debate at Centre College in Danville, Kentucky, on Oct. 11, 2012. Photographer: Rick Wilking-Pool/Getty Images
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