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    Ukraine: cessation of violence needed

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Ukraine: cessation of violence needed

Yuriy Sergeyev, Ukrainian Ambassador to the U.N., speaks with CNN's Hala Gorani, sitting in for Christiane Amanpour.

Ukraine: cessation of violence needed

Yuriy Sergeyev, Ukrainian Ambassador to the U.N., speaks with CNN's Hala Gorani, sitting in for Christiane Amanpour.