FILE - In this July 25, 2013, file photo U.S. National Security Adviser Susan Rice is seen at the White House in Washington. Sunday, Feb. 23, 2014, Rice said on NBC's "Meet the Press" that it would be a “grave mistake” for Russia to intervene militarily in Ukraine. Rice said during that during President Barack Obama's phone conversation Friday with Russian President Vladimir Putin, the two leaders agreed that a political settlement in Kiev should ensure the unity of the country and the right of Ukrainians to express their free will. (AP Photo/Carolyn Kaster)