In pictures: Gunfire erupts in Ukraine as Poroshenko talks tough
Pro-Russian militants and Ukrainian forces battled over a Donetsk airport as newly elected Petro Poroshenko threatened a robust military campaign
A Ukrainian Mi-24 helicopter gunship lines up weapons on rebels at the main terminal building of Donetsk international airport May 26, 2014. Three Ukrainian helicopter gunships mounted a heavy attack on the rebel-held international airport terminal at Donetsk on Monday, firing rockets and cannon and throwing out decoy flares as militants shot at them from the ground.YANNIS BEHRAKIS/Reuters
A Ukrainian Mi-24 helicopter gunship fires its cannons against rebels at the main terminal building of Donetsk international airport May 26, 2014.YANNIS BEHRAKIS/Reuters
A Ukrainian Mi-24 helicopter gunship makes a strafing run against targets at the main terminal building of Donetsk international airport May 26, 2014.YANNIS BEHRAKIS/Reuters
A Ukrainian Mi-24 helicopter gunship fires decoy flares over a residential area moments after attacking Donetsk international airport, May 26, 2014.YANNIS BEHRAKIS/Reuters
Pro-Russian militia men take their positions during fighting around the airport, outside Donetsk, Ukraine, on Monday, May 26, 2014. Ukraine's military launched air strikes Monday against separatists who had taken over the airport in the eastern capital of Donetsk in what appeared to be the most visible operation of the Ukrainian troops since they started a crackdown on insurgents last month.Vadim Ghirda/The Associated Press
A pro-Russian militiaman takes cover during fighting around the airport, outside Donetsk, Ukraine, on Monday, May 26, 2014.Vadim Ghirda/The Associated Press
Pro-Russia militia members climb into a van to move positions as heavy shelling erupts near Donetsk International Airport in Donetsk, Ukraine, May 26, 2014. A firefight erupted on Monday, hours after the election of a new president, Petro Poroshenko, who vowed to suppress the separatist violence in the east.MAURICIO LIMA/The New York Times
Smoke billows behind the main terminal of Donetsk international airport during heavy fighting between Ukrainian and pro-Russian forces May 26, 2014.YANNIS BEHRAKIS/Reuters
Pro-Russian insurgents aim their rifles during fighting around the airport outside Donetsk, Ukraine, Monday, May 26, 2014. Ukraine's military launched air strikes Monday against the separatists who had taken over the airport in the eastern city of Donetsk, suggesting that fighting in the east is far from over.Vadim Ghirda/The Associated Press
Pro-Russian insurgents arrive near the airport outside Donetsk, Ukraine, Monday, May 26, 2014.Vadim Ghirda/The Associated Press
Pro-Russian gunmen fire automatic rifles in Lenin Square in Donetsk, Ukraine, Sunday, May 25, 2014. A convoy of an armored personnel carrier and seven trucks carrying several hundred heavily armed men drove through central Donetsk early Sunday afternoon and gunmen got out of the trucks, stood to attention and gave shots in the air in jubilation as a crowd of several thousand supporters cheered them and chanted: "Heroes!". Ukraine's critical presidential election got underway Sunday under the wary scrutiny of a world eager for stability in a country rocked by a deadly uprising in the east.Vadim Ghirda/The Associated Press