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Photo by: Sergei Grits

A protester plays the piano in the Kiev city council building which they occupied in downtown Kiev, Ukraine, on Sunday, Dec. 1, 2013. A protest by about 300,000 Ukrainians angered by their government's decision to freeze integration with the West turned violent Sunday, when a group of demonstrators besieged the president's office and police drove them back with truncheons, tear gas and flash grenades. Dozens of people were injured. (AP Photo/Sergei Grits)

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