Ambassador defends U.S. role in Ukraine

Anti-government demonstrators stand among the smoke of burning barricades during clashes with riot police in Kiev on February 18, 2014.
Anti-government demonstrators stand among the smoke of burning barricades during clashes with riot police in Kiev on February 18, 2014.

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    Ambassador defends U.S. role in Ukraine

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CNN's Hala Gorani, sitting in for Christiane Amanpour, speaks with U.S. Ambassador to Ukraine Geoffrey Pyatt.