Vice President Joe Biden speaks to delegates at the Democratic National Convention 

Vice President Joe Biden speaks to delegates at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Lynne Sladky)
Associated Press
Vice President Joe Biden speaks to delegates at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Lynne Sladky)
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