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Photo by: Manuel Balce Ceneta

An unidentified protestor is arrested in McPherson Square in downtown Washington Sunday, Dec. 4, 2011. U.S. Park Police are arresting Occupy DC protesters who are refusing to dismantle an unfinished wooden structure erected in the park square overnight. Police Sunday told the protestors they'd need a permit for such a structure and gave them an hour to disassemble it. (AP Photo/Manuel Balce Ceneta)

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