Pro-Russian armed men in military fatigues pose for a photograph with a child as they stand guard outside a regional administration building seized in the night by pro-Russian separatists, in the eastern Ukrainian city of Kostyantynivka, on April 28, 2014. The United States moved to impose fresh sanctions against Russia today over the crisis in Ukraine, as pro-Kremlin gunmen seized another town in the east, further escalating tensions. AFP PHOTO / VASILY MAXIMOV        (Photo credit should read VASILY MAXIMOV/AFP/Getty Images)