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Ukraine crisis escalates as Russian forces pour across border

While U.S. officials said it was not an "invasion force," they admitted the Russian troop surge had effectively eliminated the border between the two countries.

A column of tanks drive from a rebel-territory to Donetsk near the town of Shakhtarsk, eastern Ukraine on Nov. 10, 2014. (Photo by Dimitar Dilkoff/AFP/Getty)
A column of tanks drive from a rebel-territory to Donetsk near the town of Shakhtarsk, eastern Ukraine on Nov. 10, 2014. New unidentified armoured columns rumbled toward the pro-Moscow rebel stronghold in eastern Ukraine.AFP/Getty Images

Benjamin Landy