Commander of the Slaviansk self-defence battalion Vyacheslav Ponomaryov addresses the media at the mayor's office in Slaviansk in this April 14, 2014 file photo. In an uprising whose calling cards are... more 
Commander of the Slaviansk self-defence battalion Vyacheslav Ponomaryov addresses the media at the mayor's office in Slaviansk in this April 14, 2014 file photo. In an uprising whose calling cards are the Kalashnikov and the black balaclava, Denis Pushilin and Vyacheslav Ponomaryov have become the unmasked faces of the pro-Russian separatist movement in eastern Ukraine that has plunged Moscow and the West into their most ominous confrontation since the Cold War. To match Insight UKRAINE-CRISIS/LEADERS REUTERS/Gleb Garanich/Files (UKRAINE - Tags: POLITICS CIVIL UNREST) less 
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Reuters | Photo By GLEB GARANICH / REUTERS
Wed, Apr 23, 2014 6:30 PM EDT