President Obama is responding to the invasion of Crimea with plans to economically and diplomatically "isolate Russia." With thousands of Russian troops on the ground, what options do the U.S. and European allies really have? Anderson asked Chief White House Correspondent Jim Acosta.
Anderson Cooper goes beyond the headlines to tell stories from many points of view, so you can make up your own mind about the news. Tune in weeknights at 8 and 10 ET on CNN.
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