US Urges Russian Action As Tension Mounts In Eastern Ukraine

SLOV'YANS'K, UKRAINE - APRIL 22: A funeral service is held for three pro-Russian activists who were killed on Easter Sunday when gunmen opened fire at a checkpoint they were manning on April 22, 2014 in Slovyansk, Ukraine. Pro-Russian militants have been manning roadblocks around Slovyansk and have taken control of government buildings in the city. They are demanding independence from Ukraine. Other pro-Russian activists have been occupying government buildings in other eastern Ukraine cities in recent weeks making similar demands. (Photo by Scott Olson/Getty Images)