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A masked gunman guards combat vehicles with Russian, Donetsk Republic and Ukrainian paratroopers, flags and gunmen on top, parked in downtown of Slovyansk on Wednesday, April 16, 2014.
A masked gunman guards combat vehicles with Russian, Donetsk Republic and Ukrainian paratroopers, flags and gunmen on top, parked in downtown of Slovyansk on Wednesday, April 16, 2014.

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    Russia's red line for intervention

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Russia's red line for intervention

Putin-ally Vyacheslav Nikonov says that Russia would intervene in Ukraine if there were "full-scale civil war."

Russia's red line for intervention

Putin-ally Vyacheslav Nikonov says that Russia would intervene in Ukraine if there were "full-scale civil war."