U.S. Vice President Joe Biden addresses the 2016 U.S. Democratic National Convention at Wells Fargo Center, Philadelphia, Pennsylvania, the United States on July 27, 2016. (Xinhua/Li Muzi)
U.S. Vice President Joe Biden addresses the 2016 U.S. Democratic National Convention at Wells Fargo Center, Philadelphia, Pennsylvania, the United States on July 27, 2016. (Xinhua/Li Muzi)
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