Few options for U.S. on Russia’s Ukraine intervention?
Clip: 03/04/2014 | 12m 50s
Chief foreign correspondent Margaret Warner offers background on possible diplomatic steps for the U.S. on the Crimea crisis, then Judy Woodruff talks to John Mearsheimer of the University of Chicago and Amy Knight, author of "How the Cold War Began," about how far the U.S. is prepared to push Russia out of Ukraine and who is to blame for the conflict.
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