Photos: Tensions rise between riot police, protesters in Kiev
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Pro Europe opposition activists armed with improvised weapons prepare for a police assault inside city hall in Kiev, Ukraine, Monday, Dec. 9, 2013. Hundreds of police in full riot gear on Monday flooded the center of Kiev key sites of mass anti-government protests that have gripped the capital for weeks, raising fears of a crackdown.(AP Photo/Efrem Lukatsky)