DENVER - AUGUST 27: U.S. Democratic Vice-Presidential nominee Sen. Joe Biden (D-DE) (R) is waks with his son Delaware Attorney General Beau Biden, during day three of the Democratic National Convention (DNC) at the Pepsi Center August 27, 2008 in Denver, Colorado. U.S. Sen. Barack Obama (D-IL) will be officially be nominated as the Democratic candidate for U.S. president on the last day of the four-day convention. (Photo by Mark Wilson/Getty Images)
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