Bill Clinton backs Obama, Biden accepts nomination

Joe Biden raises his arms at delegates at the DNC
U.S. Democratic Vice-Presidential nominee Sen. Joe Biden, D-Del., raises his arms during day three of the Democratic National Convention at the Pepsi Center August 27, 2008 in Denver, Colorado. U.S. Sen. Barack Obama, D-Ill., will be officially be nominated as the Democratic candidate for U.S. president on the last day of the four-day convention.
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