(120904) -- CHARLOTTE, Sept. 4, 2012 (Xinhua) -- Police block protestors outside the venues for the Democratic National Convention (DNC) in Charlotte, North Carolina, the United States, Sept. 4, 2012. U.S. President Barack Obama is to be named the Democratic Party's nominee during the DNC, which is scheduled to be held from Sept. 4 to Sept. 6. (Xinhua/Zhang Jun)
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