Russia and Ukraine have been locked in a tense stand-off since Russia's upper house of parliament approved the deployment of its forces in Crimea on March 1. Armed men -- without military insignia, but believed to be Russian -- have been guarding airports and government buildings on the Crimean peninsula, while more forces were massing near the Kerch Strait, which separates Crimea from Russia.
Russia's Military Presence in Crimea
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A Ukrainian woman speaks with armed men in military uniform, believed to be Russian soldiers, outside the Ukrainian naval base in Feodosia, Crimea.
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Military personnel, believed to be Russian servicemen, stand outside a Ukrainian military post near SImferopol. A Ukrainian serviceman is seen behind the gate.
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Ukrainian servicemen stand guard at their base in the village of Lyubimovka, southwest of Simferopol.
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A Ukrainian Air Force aircraft flies over the Ukrainian naval base near Feodosia, which is blocked by soldiers believed to be Russian.