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Iraqi Sunni masked protesters burn tires to blocked the main highway to Jordan and Syria, outside Fallujah, 40 miles (65 kilometers) west of Baghdad, Iraq, Monday, Dec. 30, 2013.
Iraqi Sunni masked protesters burn tires to blocked the main highway to Jordan and Syria, outside Fallujah, 40 miles (65 kilometers) west of Baghdad, Iraq, Monday, Dec. 30, 2013.

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Iraq violence: Assessing U.S. role

CNN's Christiane Amanpour speaks with Meghan O'Sullivan, Former U.S. Deputy National Security Adviser for Iraq.

Iraq violence: Assessing U.S. role

CNN's Christiane Amanpour speaks with Meghan O'Sullivan, Former U.S. Deputy National Security Adviser for Iraq.