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President Barack Obama speaks about Ukraine in the James Brady Press Briefing Room at the White House in Washington, Friday, Feb. 28, 2014. Obama's statement comes as his administration is expressing growing concern over Russian intentions in Ukraine. Secretary of State John Kerry delivered a blunt warning Friday to Moscow against military moves in the country's southern Crimea region that could further inflame tensions. (AP Photo/Charles Dharapak)
President Barack Obama speaks about Ukraine in the James Brady Press Briefing Room at the White House in Washington, Friday, Feb. 28, 2014. Obama's statement comes as his administration is expressing growing concern over Russian intentions in Ukraine. Secretary of State John Kerry delivered a blunt warning Friday to Moscow against military moves in the country's southern Crimea region that could further inflame tensions. (AP Photo/Charles Dharapak)

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