Imazhe nga Ukraina

Ukrainian servicemen look on as an armed man, believed to be a Russian soldier, stands guard inside a Ukrainian military base in the Crimean town of Yevpatoria, March 5, 2014.

Uniformed men, believed to be Russian servicemen, march outside a Ukrainian military base in the village of Perevalnoye, outside Simferopol, March 5, 2014.

Ukrainian Navy soldiers raise their flag on top of the Ukrainian navy corvette Ternopil at the Crimean port of Sevastopol, March 5, 2014.

Russian soldiers fire warning shots at the Belbek air base, outside Sevastopol, Ukraine, March 4, 2014.

A Russian soldier marches as he and comrades block the Ukrainian infantry base in Perevalne, Ukraine, March 4, 2014.

Russian military armored personnel carriers drive from Sevastopol to Simferopol, Crimea, Ukraine, March 4, 2014.

Ukrainian officers march at the Belbek air base, outside Sevastopol, Ukraine, March 4, 2014.

Russian servicemen stand on duty near a map of the Crimea region near the city of Kerch, March 4, 2014.

U.S.Secretary of State John Kerry lays roses atop the Shrine of the Fallen in Kyiv, March 4, 2014.

A woman passes by Ukrainian recruits receiving military instructions in Kyiv's Independence Square, March 4, 2014.

Ukrainian recruits receive instructions from a commander in a recruitment self defense quarter at Kyiv's Independence Square, March 4, 2014.