A Ukrainian MI-24 military helicopter flies overhead at a checkpoint which was set on fire and left by pro-Russian separatists near Slavyansk April 24, 2014. Ukrainian forces clashed with pro-Russian ... more 
A Ukrainian MI-24 military helicopter flies overhead at a checkpoint which was set on fire and left by pro-Russian separatists near Slavyansk April 24, 2014. Ukrainian forces clashed with pro-Russian militants as they closed in on the separatist-held city of Slaviansk on Thursday, seizing rebel checkpoints and setting up roadblocks as helicopters circled overhead. Reuters journalists saw a Ukrainian detachment with five armoured personnel carriers take over the checkpoint on a road north of the city in late morning after it was abandoned by separatists who set tyres alight to cover their retreat. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST MILITARY TRANSPORT) less 
1 / 25
Reuters | Photo By GLEB GARANICH / REUTERS
Thu, Apr 24, 2014 7:59 AM EDT