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ARLINGTON, VA - FEBRUARY 25: U.S. European Commander Air Force Gen. Philip Breedlove conducts a news briefing February 25, 2015 at the Pentagon in Arlington, Virginia. Gen. Breedlove discussed the current situation of the Russian military intervention in Ukraine. (Photo by Alex Wong/Getty Images)

ARLINGTON, VA - FEBRUARY 25:  U.S. European Commander Air Force Gen. Philip Breedlove conducts a news briefing February 25, 2015 at the Pentagon in Arlington, Virginia. Gen. Breedlove discussed the current situation of the Russian military intervention in Ukraine.  (Photo by Alex Wong/Getty Images)