Ukrainian prisoners-of-war (POWs) sit inside a bus as they return home after being exchanged for pro-Russian separatist prisoners, in Kiev December 27, 2014. Ukrainian President Petro Poroshenko was ... more 
Ukrainian prisoners-of-war (POWs) sit inside a bus as they return home after being exchanged for pro-Russian separatist prisoners, in Kiev December 27, 2014. Ukrainian President Petro Poroshenko was the first to welcome home dozens of prisoners of war at an airport in Kiev on Saturday, after they were exchanged with hundreds of pro-Russian separatist prisoners. REUTERS/Mikhail Palinchak/Ukrainian Presidential Press Service/Handout via Reuters (UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT) ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THE AUTHENTICITY, CONTENT, LOCATION OR DATE OF THIS IMAGE. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS less 
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Reuters | Photo By HANDOUT / REUTERS
Sat, Dec 27, 2014 4:32 AM EST