Armed Russian navy servicemen surround a Ukrainian border guard base in Balaclava, in the Crimea region February 28, 2014. (Photo by Baz Ratner/Reuters)

Unidentified gunmen wearing camouflage uniforms guard the entrance to the military airport at the Black Sea port of Sevastopol in Crimea, Ukraine, Friday, February 28, 2014. Russian troops took control of the two main airports in the strategic peninsula of Crimea, Ukraine's interior minister charged, as the country asked the U.N. Security Council to intervene in the escalating conflict. Russian state media said Russian forces in Crimea denied involvement. No violence was reported at the civilian airport in Crimea's capital of Simferopol or at the military airport in the Black Sea port of Sevastopol, also part of Crimea. At the Simferopol airport, a man claiming to speak for the camouflage-clad forces patrolling the airport described them as Crimean militiamen. (Photo by Ivan Sekretarev/AP Photo)

Russian armored personnel carriers and a truck are parked on the side of the road near the town of Bakhchisarai, Ukraine, Friday, February 28, 2014. The vehicles were parked on the side of the road near the town of Bakhchisarai, apparently because one of them had mechanical problems. (Photo by Ivan Sekretarev/AP Photo)

An unidentified gunman searches a vehicle while he and others block the road toward the military airport at the Black Sea port of Sevastopol in Crimea, Ukraine, Friday, February 28, 2014. (Photo by Ivan Sekretarev/AP Photo)

Russian troops block the road way towards the military airport at the Black Sea port of Sevastopol in Crimea, Ukraine, Friday, February 28, 2014. Heightened security is evident with Russian military around Sevastopol, the location for Russia military bases, military airport and Naval Base, while unidentified armed men wearing uniforms without insignia were patrolling another airport serving the regional capital, Ukraine's new Interior Minister Arsen Avakov said on Friday. (Photo by Andrew Lubimov/AP Photo)

A demonstrator waves a Sevastopol civic flag during a rally in support of Russian-speaking provinces in eastern and southern Ukraine where many oppose the new authorities in Kiev in Moscow, Russia, Saturday, March 1, 2014. Russian President Vladimir Putin asked parliament Saturday for permission to use the country's military in Ukraine, moving to formalize troop deployments that Ukrainian officials have described as an ongoing invasion of the strategic region of Crimea. (Photo by Alexander Zemlianichenko/AP Photo)

Wounded supporters of Ukraine's new government sit on the ground, in an area protected by the police, after clashes with pro-Russian protesters in central Kharkiv March 1, 2014. Pro-Russia activists clashed with supporters of the new Ukrainian government in the eastern Ukrainian city of Kharkiv on Saturday and tried to seize the regional governor's headquarters, Interfax news agency said. (Photo by Reuters/Stringer)

A wounded pro-Western activist sits after clashes with pro-Russia activists at the local administration building in the northeastern city of Kharkiv, Ukraine, Saturday, March 1, 2014. Supporters of new Ukrainian authorities and pro-Russia demonstrators clashed in Kharkiv, a mostly Russian-speaking region in eastern Ukraine. (Photo by Olga Ivashchenko/AP Photo)

Wounded supporters of Ukraine's new government sit on the ground after clashes with pro-Russian protesters in central Kharkiv March 1, 2014. (Photo by Reuters/Stringer)

Pro-Russian protesters drag a wounded man during clashes with supporters of Ukraine's new government in central Kharkiv March 1, 2014. (Photo by Reuters/Stringer)

Ukrainian people take part in a rally against Russia in front of the U.S. embassy in Kiev March 1, 2014. NATO ambassadors will meet in Brussels on Sunday to discuss the situation in Ukraine, NATO Secretary General Anders Fogh Rasmussen tweeted on Saturday. (Photo by Gleb Garanich/Reuters)

A pro-Russian protester (C) clashes with a supporters of Ukraine's new government in central Kharkiv March 1, 2014. (Photo by Reuters/Stringer)

A Ukrainian man stands in protest in front of gunmen in unmarked uniforms as they stand guard in Balaklava, on the outskirts of Sevastopol, Ukraine, Saturday, March 1, 2014. (Photo by Andrew Lubimov/AP Photo)

A pro-Russian man (not seen) holds a Russian flag behind an armed servicemen on top of a Russian army vehicle outside a Ukrainian border guard post in the Crimean town of Balaclava March 1, 2014. Ukraine accused Russia on Saturday of sending thousands of extra troops to Crimea and placed its military in the area on high alert as the Black Sea peninsula appeared to slip beyond Kiev's control. (Photo by Baz Ratner/Reuters)

Orthodox monks pray near an armed serviceman in a Russian army vehicle outside a Ukrainian border guard post in the Crimean town of Balaclava March 1, 2014. (Photo by Baz Ratner/Reuters)

A couple stands next to armed servicemen outside a Ukrainian border guard post in the Crimean town of Balaclava March 1, 2014. (Photo by Baz Ratner/Reuters)

An armed serviceman stands near Russian army vehicles outside a Ukrainian border guard post in the Crimean town of Balaclava March 1, 2014. (Photo by Baz Ratner/Reuters)

Orthodox monks pray next to armed servicemen near Russian army vehicles outside a Ukrainian border guard post in the Crimean town of Balaclava March 1, 2014. (Photo by Baz Ratner/Reuters)

Armed servicemen stand near a Ukrainian border guard post in the Crimean town of Balaclava March 1, 2014. (Photo by Baz Ratner/Reuters)

Pro-Russian men hold Russian flags in front of armed servicemen near Russian army vehicles outside a Ukrainian border guard post in the Crimean town of Balaclava March 1, 2014. Ukraine accused Russia on Saturday of sending thousands of extra troops to Crimea and placed its military in the area on high alert as the Black Sea peninsula appeared to slip beyond Kiev's control. (Photo by Baz Ratner/Reuters)

Pro-Russian protesters clash with a supporter of Ukraine's new government during a rally in central Donetsk March 1, 2014. Russian President Vladimir Putin has asked the upper house of parliament to approve sending armed forces to Ukraine's Crimea region, the Kremlin said in a statement on Saturday. The Crimea region has a majority ethnic Russian population. (Photo by Reuters/Stringer)

Troops in unmarked uniforms stand guard in Balaklava as people walk in a street, on the outskirts of Sevastopol, Ukraine, Saturday, March 1, 2014. An emblem on one of the vehicles and their number plates identify them as belonging to the Russian military. Ukrainian officials have accused Russia of sending new troops into Crimea, a strategic Russia-speaking region that hosts a major Russian navy base. Kremlin hasn’t responded to the accusations, but Russian lawmakers urged Putin to act to protect Russians in Crimea. (Photo by Andrew Lubimov/AP Photo)

Troops in unmarked uniforms stand guard as they take control the Coast Guard offices in Balaklava on the outskirts of Sevastopol, Ukraine, Saturday, March 1, 2014. An emblem on one of the vehicles and their number plates identify them as belonging to the Russian military. Ukrainian officials have accused Russia of sending new troops into Crimea, a strategic Russia-speaking region that hosts a major Russian navy base. (Photo by Andrew Lubimov/AP Photo)

Pro-Western activists, one of them covering his head with a Ukrainian flag, sit after being overpowered by pro-Russia activists after clashes at the local administration building in the northeastern city of Kharkiv, Ukraine, Saturday, March 1, 2014. Supporters of new Ukrainian authorities and pro-Russia demonstrators clashed in Kharkiv, a mostly Russian-speaking region in eastern Ukraine. (Photo by Olga Ivashchenko/AP Photo)

Pro-Russian activists walk after clashes with pro-Western activists at the local administration building in the northeastern city of Kharkiv, Ukraine, Saturday, March 1, 2014. (Photo by Olga Ivashchenko/AP Photo)

Unidentified gunmen wearing camouflage uniforms block the entrance of the Crimean Parliament building in Simferopol, Ukraine, Saturday, March 1, 2014. The discord between Russia and Ukraine sharpened Saturday when the pro-Russian leader of Ukraine's Crimea region claimed control of the military and police and appealed to Russia's president for help in keeping peace there. Poster reads “Crimea Russia”. (Photo by Ivan Sekretarev/AP Photo)

Troops in unmarked uniforms stand guard in Balaklava as people walk in a street, on the outskirts of Sevastopol, Ukraine, Saturday, March 1, 2014. (Photo by Andrew Lubimov/AP Photo)

A gunman in unmarked uniform stands guard as troops take control the the Coast Guard offices in Balaklava on the outskirts of Sevastopol, Ukraine, Saturday, March 1, 2014. (Photo by Andrew Lubimov/AP Photo)

Troops in unmarked uniforms stand guard in Balaklava on the outskirts of Sevastopol, Ukraine, Saturday, March 1, 2014. (Photo by Andrew Lubimov/AP Photo)

Pro-Western activists sit after being overpowered by pro-Russia activists after clashes at the local administration building in the northeastern city of Kharkiv, Ukraine, Saturday, March 1, 2014. (Photo by Olga Ivashchenko/AP Photo)

Troops in unmarked uniforms stand guard as they take control the Coast Guard offices in Balaklava on the outskirts of Sevastopol, Ukraine, Saturday, March 1, 2014. (Photo by Andrew Lubimov/AP Photo)

Local residents carry a Russian flag and shout slogans rallying over the streets of Crimean capital Simferopol, Ukraine, on Saturday, March 1, 2014. (Photo by Ivan Sekretarev/AP Photo)

Ukrainian Army General and Hero of Ukraine Yuri Tishkov, left, surveys broken equipment at the air control tower for Kirov military airfield, in Feodosia, Crimea, Ukraine, Saturday, March 1, 2014. General Tishkov accused armed men, who he said were Russian troops, of braking into the air control tower and smashing much of the equipment on Friday, and then left the area. (Photo by Darko Vojinovic/AP Photo)

Local residents carry Russian flags and shout slogans rallying over the streets of Crimean capital Simferopol, Ukraine, on Saturday, March 1, 2014. Russian President Vladimir Putin asked parliament Saturday for permission to use the countryпїЅs military in Ukraine, moving to formalize what Ukrainian officials described as an ongoing deployment of Russian military on the countryпїЅs strategic region of Crimea. (Photo by Ivan Sekretarev/AP Photo)

Local residents carry giant Russian flags and shout slogans rallying over the streets of Crimean capital Simferopol, Ukraine, on Saturday, March 1, 2014. (Photo by Ivan Sekretarev/AP Photo)

An unidentified man guards the entrance to a local government building in Simferopol, Ukraine, on Saturday, March 1, 2014. (Photo by Ivan Sekretarev/AP Photo)

Pro-Russian activists remove the Ukrainian flag, center, to replace it with a Russian one on an administration office in the center of Donetsk, Ukraine, Saturday, March 1, 2014. (Photo by Sergey Vaganov/AP Photo)

An anti-Yanukovych protester controls a street at a barricade in center of Kiev, Ukraine, Saturday, March 1, 2014. The pro-Russian prime minister of Ukraine's restive Crimea is claiming control of all military forces, police and other security services in the region. In a statement reported by local and Russian news agencies on Saturday, Sergei Aksenov declares that the armed forces, the police, the national security service and border guards will answer only to his orders. He says that any commanders who don't agree should leave their posts. (Photo by Efrem Lukatsky/AP Photo)

Pro-Russian activists hold Russian flags during a rally in the center of Donetsk, Ukraine, Saturday, March 1, 2014. (Photo by Sergey Vaganov/AP Photo)

Pro-Russian activists hold Russian flags during a rally in center of Donetsk, Ukraine, Saturday, March 1, 2014. Supporters of new Ukrainian authorities and pro-Russia demonstrators clashed in Kharkiv and Donetsk a mostly Russian-speaking region in eastern Ukraine. Poster at right reads: “Donetsk with Russia”. (Photo by Sergey Vaganov/AP Photo)

Pro-Russian activists put Russian flags over the administration office in the center of Donetsk, Ukraine, Saturday, March 1, 2014. Supporters of the new Ukrainian authorities and pro-Russia demonstrators clashed in Kharkiv and Donetsk a mostly Russian-speaking region in eastern Ukraine. (Photo by Sergey Vaganov/AP Photo)

An anti-Yanukovych protester stands at a memorial for the people killed in clashes with the police at Kiev's Independence Square, the epicenter of the country's current unrest, Saturday, March 1, 2014. The pro-Russian prime minister of Ukraine's restive Crimea is claiming control of all military forces, police and other security services in the region. In a statement reported by local and Russian news agencies on Saturday, Sergei Aksenov declares that the armed forces, the police, the national security service and border guards will answer only to his orders. He says that any commanders who don't agree should leave their posts. (Photo by Emilio Morenatti/AP Photo)

Troops in unmarked uniforms stand guard as they taking control the the Caost Guard offices in Balaklava on the outskirts of Sevastopol, Ukraine, Saturday, March 1, 2014. An emblem on one of the vehicles and their number plates identify them as belonging to the Russian military. Ukrainian officials have accused Russia of sending new troops into Crimea, a strategic Russia-speaking region that hosts a major Russian navy base. (Photo by Andrew Lubimov/AP Photo)

A young man carrying flowers confronts heavily-armed soldiers displaying no identifying insignia in a street in the city center on March 1, 2014 in Simferopol, Ukraine. (Photo by Sean Gallup/Getty Images)

Troops in unmarked uniforms stand guard in Balaklava on the outskirts of Sevastopol, Ukraine, Saturday, March 1, 2014. An emblem on one of the vehicles and their number plates identify them as belonging to the Russian military. (Photo by Andrew Lubimov/AP Photo)

Two young women sit in a shop that sells evening gowns as heavily-armed soldiers displaying no identifying insignia stand outside in a street in the city center on March 1, 2014 in Simferopol, Ukraine. Similarly dressed soldiers stationed themselves around the Crimean Parliament building earlier in the day in what seems to be a growing military occupation of the city, which is the Crimean capital. The day before unidentified soldiers occupied Simferopol International Airport and Russian soldiers occupied the airport at nearby Sevastapol in moves that are raising tensions between Russia and the new Kiev government. Crimea has a majority Russian population and armed, pro-Russian groups have occupied government buildings in Simferopol. (Photo by Sean Gallup/Getty Images)

Pro-Russian protesters, including one woman holding a sign that reads: “The time has come to return my name! I am Russia. And not Ukraine!”, hold up a giant Russian flag as they march in Simferopol, Ukraine, on 1 March. (Photo by Sean Gallup/Getty Images)