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(CNN) – Whether Russia's activities in Ukraine add up to an invasion is, at this point, a matter of semantics, says former CIA director Gen. Michael Hayden.
"Invasion, infiltration – it may be a difference without much distinction," Hayden said in an interview with CNN's "The Lead with Jake Tapper."
There is no appetite in the U.S. to get military involved in the crisis in Ukraine. But acknowledging that America is "war weary," Hayden said the U.S. should provide arms to the Ukrainian military.
Obama needs to make the case to the American people that failure in Ukraine "leads to an unraveling of the post-Cold War status quo in Europe," says Hayden.
For more of our interview with Gen. Hayden, check out the video above.