SEVASTOPOL, UKRAINE - MARCH 07: Russian warships, part of a blockade of Ukrainian ships, is viewed in Sevastopol harbor on March 7, 2014 in Sevastopol, 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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