Turkish President Recep Tayyip Erdogan (C), Russian President Vladimir Putin (L) and Iranian President Hassan Rouhani pose for a group photo after their summit in Ankara, Turkey, on Sept. 16, 2019. Turkey, Russia and Iran focused on the security issue in Syria on Monday in Ankara during a three-way talk and emphasized the need of a long-lasting truce in the northwestern Idlib region of the war-torn country. (Photo by Mustafa Kaya/Xinhua)