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U.S. Army Chief Of Staff Gen. Ray Odierno speaks to the media during last briefing at the Pentagon before he retires, August 12, 2015 in Washington, D.C.
U.S. Army Chief Of Staff Gen. Ray Odierno speaks to the media during last briefing at the Pentagon before he retires, August 12, 2015 in Washington, D.C.

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    How dangerous is Russia to the U.S.?

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How dangerous is Russia to the U.S.?

Outgoing Army Chief says Russia is the most dangerous threat to the United States. CNN's Jim Sciutto reports.

How dangerous is Russia to the U.S.?

Outgoing Army Chief says Russia is the most dangerous threat to the United States. CNN's Jim Sciutto reports.