Ukraine

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In this frame grab provided by the Russian Television via the APTN, President Vladimir Putin, during a live feed, answers journalists' questions on the current situation around Ukraine at the Novo-Ogaryovo presidential residence outside Moscow, on Tuesday, March 4, 2014. (AP Photo/Russian Television via APTN)

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An armed Ukrainian airman smokes as he and others guard what's left under their control at the Belbek air base, outside Sevastopol, Ukraine, on Tuesday, March 4, 2014. Russian troops, who had taken control over Belbek airbase, fired warning shots in the air as around 300 Ukrainian officers marched towards them to demand their jobs back. (AP Photo/Ivan Sekretarev)

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A Ukrainian airman puts the national flag over the gate as they guard what's left under their control at the Belbek air base, outside Sevastopol, Ukraine, on Tuesday, March 4, 2014. Russian troops, who had taken control over Belbek airbase, fired warning shots in the air as around 300 Ukrainian officers marched towards them to demand their jobs back. (AP Photo/Ivan Sekretarev)

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Russian soldiers fire warning shots at the Belbek air base, outside Sevastopol, Ukraine, on Tuesday, March 4, 2014. Russian troops, who had taken control over Belbek airbase, fired warning shots in the air as around 300 Ukrainian officers marched towards them to demand their jobs back. (AP Photo/Ivan Sekretarev)

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Ukrainian officers march at the Belbek air base, outside Sevastopol, Ukraine, on Tuesday, March 4, 2014. Russian troops, who had taken control over Belbek airbase, fired warning shots in the air as around 300 Ukrainian officers marched towards them to demand their jobs back. (AP Photo/Ivan Sekretarev)

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Ukraine's Anatoliy Tymoschuk, left, and Ruslan Rotan attend a training session in Ayia Napa resort on the southeast of Cyprus, Tuesday March 4, 2014. The Ukrainians will play the United States in a friendly match on Wednesday in Cyprus, after the match was moved from Kharkiv in Ukraine to Larnaca in Cyprus for security reasons. (AP Photo/Petros Karadjias)

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Ukraine soccer coach, Mykhailo Fomenko, facing, speaks to his players during a training session in the Ayia Napa resort on the southeast of the island of Cyprus, Tuesday March 4, 2014. The Ukrainians will play the United States in a friendly match on Wednesday in Cyprus, after the match was moved from Kharkiv in Ukraine to Larnaca in Cyprus for security reasons. (AP Photo/Petros Karadjias)

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President Barack Obama answers a question regarding the ongoing situation in the Ukraine during his visit to Powell Elementary School in the Petworth neighborhood of Washington, Tuesday, March 4, 2014, where he went to discuss his fiscal 2015 federal budget proposels. AP Photo/Pablo Martinez Monsivais)