TOPSHOT - A fighter from the Nureddine al-Zinki unit, a moderate Syrian opposition faction affiliated with the Muslim Brotherhood and made up of former Syrian Free Army fighters, mans a position in a rebel-held part of Aleppo province that lies directly east of the main opposition bastion in Idlibon September 23, 2018. - Under a Russia-Turkey agreement announced recently, a demilitarised zone is to be set up around Idlib, one of the country's last major jihadist and rebel bastions on the border with Turkey. (Photo by Nazeer AL-KHATIB / AFP)