Vice President Joe Biden, left, followed by his daughter Ashley Biden, center, 

Vice President Joe Biden, left, followed by his daughter Ashley Biden, center, and son Beau Biden, right, walk out of Air Force Two upon their arrival at Lexington Blue Grass Airport, Thursday, Oct. 11, 2012, in Lexington, Ky., for the vice presidential debate. (AP Photo/Pablo Martinez Monsivais)
Associated Press
Vice President Joe Biden, left, followed by his daughter Ashley Biden, center, and son Beau Biden, right, walk out of Air Force Two upon their arrival at Lexington Blue Grass Airport, Thursday, Oct. 11, 2012, in Lexington, Ky., for the vice presidential debate. (AP Photo/Pablo Martinez Monsivais)
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