Joseph R. Biden

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Vice President Joseph R. Biden addresses the American-Israeli Public Affairs Committee (AIPAC) 2013 Policy Conference on at the Walter E. Washington Convention Center in Washington on March 4, 2013. (Associated Press)

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** FILE ** Vice President Joseph R. Biden gestures as he speaks at a gun-violence conference in Danbury, Conn., Thursday, Feb. 21, 2013. (AP Photo/Jessica Hill)

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Vice President Joseph R. Biden posted this photo of summer fun on his twitter feed in 2012.

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David and Francine Wheeler, parents of Sandy Hook Elementary School shooting victim Benjamin Wheeler, embrace during the gun violence conference in Danbury, Conn., on Thursday attended by Vice President Joseph R. Biden. Mr. Biden said politicians must speak for victims of gun violence who can no longer do so themselves. (Associated Press)