ISTANBUL, TURKEY - APRIL 17: (----EDITORIAL USE ONLY MANDATORY CREDIT - "TURKISH PRESIDENCY / YASIN BULBUL / HANDOUT" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) Turkish President Recep Tayyip Erdogan (L) greets people during his visit the Tomb of Abu Ayyub al-Ansari in Istanbul, Turkey on April 17, 2017. (Photo by Turkish Presidency / Yasin Bulbul / Handout/Anadolu Agency/Getty Images)
