Russian President Vladimir Putin (L) meets with Chechnya’s leader Ramzan Kadyrov at the Kremlin in Moscow, Russia, in this December 10, 2015 file photo. To match story RUSSIA-CHECHNYA/ REUTERS/Mikhail Klimentyev/Sputnik/Kremlin/Files ATTENTION EDITORS — THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS.