Pro-Moscow troops seized parts of a Ukrainian naval base March 19 in Sevastopol and raised a Russian flag over its headquarters.
Sevastopol Naval Based Sized By Pro-Moscow Troops
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Ukraine -- A Ukrainian naval officer (C) passes by armed men, believed to be Russian servicemen, as he leaves the naval headquarters in Sevastopol, March 19, 2014
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Ukraine -- An armed man, believed to be a Russian serviceman, guards near the naval headquarters in Sevastopol, March 19, 2014
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Ukraine -- Armed men, believed to be Russian servicemen, check documents of Russian navy officers who enter the territory of the naval headquarters in Sevastopol, March 19, 2014
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Ukraine -- People hold a banner, which reads "Sevastopol", outside the territory of the naval headquarters in Sevastopol, March 19, 2014