Enemy at the gates: Ukraine under siege

Soldiers in unmarked uniforms take control of airports in Ukraine.

Russian armored personnel carriers and a truck are parked on the side of the road near the town of Bakhchisarai, Ukraine, Feb. 28, 2014. (Associated Press)

Russian armored personnel carriers and a truck are parked on the side of the road near the town of Bakhchisarai, Ukraine, Feb. 28, 2014. (Associated Press)

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