US Urges Russian Action As Tension Mounts In Eastern Ukraine

KHARKIV, UKRAINE - APRIL 22: A small group of pro-Russian, pro-Communist, and other individuals gather below a statue of Russian revolutionary leader Vladimir Lenin on Freedom Square on what would have been his 144th birthday on April 22, 2014 in Kharkiv, Ukraine. Pro-Russian activists have been occupying government buildings and demanding greater autonomy in many Eastern Ukrainian cities in recent weeks. (Photo by Brendan Hoffman/Getty Images)