U.S. Amb.: No evidence to believe Putin

An armed pro-Russian miltant guards on the check-point Semenovka, near eastern Ukrainian city of Slavyansk on May 21, 2014.
An armed pro-Russian miltant guards on the check-point Semenovka, near eastern Ukrainian city of Slavyansk on May 21, 2014.

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    U.S. Amb.: No evidence to believe Putin

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The U.S. ambassador to the OSCE tells CNN that Russian troops are still in a "menacing posture" on Ukraine's border.