Russian President Vladimir Putin (4th R) and Turkish President Tayyip Erdogan (2nd R) listen to Chairman of the Council of Muftis of Russia Ravil Gainutdin (5th R) during a tour around the Moscow Grand Mosque after an opening ceremony in Moscow, Russia, September 23, 2015. (Photo by Alexei Druzhinin/Reuters/RIA Novosti/Kremlin)
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