US Urges Russian Action As Tension Mounts In Eastern Ukraine

KHARKIV, UKRAINE - APRIL 24: Police watch pro-Russian separatists holding a rally outside from a window in the regional administration building on April 24, 2014 in Kharkiv, Ukraine. The legislative body for the Kharkiv region, which was holding a session, was urged by pro-Russian protesters to schedule a referendum on greater autonomy from the central government in Kiev. (Photo by Brendan Hoffman/Getty Images)