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Russia's President Vladimir Putin, center, and Defense Minister Sergei Shoigu, left, arrives to watch a military exercise at the Kirillovsky firing ground in the Leningrad region, on March 3, 2014.
Russia's President Vladimir Putin, center, and Defense Minister Sergei Shoigu, left, arrives to watch a military exercise at the Kirillovsky firing ground in the Leningrad region, on March 3, 2014.

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Russia likely to invade Ukraine?

A U.S. report states Russian buildup is "significantly more" than needed for exercises.

Russia likely to invade Ukraine?

A U.S. report states Russian buildup is "significantly more" than needed for exercises.