On Tuesday, the U.S. Mission to NATO published satellite imagery via Twitter.
Russian troops are visible near the border in imagery dated May 9, two days after Putin announced they had withdrawn.
The Russian troop presence by Ukraine's border is still visible in imagery dated May 12.
U.S. Secretary of State John Kerry addressed the on-going crisis in Ukraine at a joint news conference with Italian Foreign Minister Federica Mogherini Tuesday evening, asserting "Ukraine's future won't be determined at the barrel of a gun, or through ballots marked in Moscow."
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