PEREVEVALNE, UKRAINE - MARCH 06: Russian paramilitaries stand guard outside of a Ukrainian military base in the town of Perevevalne near the Crimean city of Simferopol on March 6, 2014 in Perevevalne, Ukraine. As the standoff between the Russian military and Ukrainian forces continues in Ukraine's Crimean peninsula, world leaders are pushing for a diplomatic solution to the escalating situation. Crimean citizens will vote in a referendum on 16 March on whether to become part of the Russian federation. (Photo by Spencer Platt/Getty Images)
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