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A Ukrainian helicopter flies over a column of Ukrainian Army combat vehicles on the way to Kramatorsk, Ukraine, on April 16.
A Ukrainian helicopter flies over a column of Ukrainian Army combat vehicles on the way to Kramatorsk, Ukraine, on April 16.

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    Militants, army face off in Ukraine

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Militants, army face off in Ukraine

Militants, army face off in eastern Ukraine amid soaring tensions. CNN's Nick Paton Walsh reports.

Militants, army face off in Ukraine

Militants, army face off in eastern Ukraine amid soaring tensions. CNN's Nick Paton Walsh reports.