TOPSHOT - A Syrian child tries an improvised gas mask made by his father as part of preparations for any upcoming raids in the rebel-held Idlib province's village of Maar Shurin, on September 11, 2018. - Fearing government forces and their allies military advance to retake Idlib province, Syrian father of three children Hadheefa al-Shahadh, 27, learnt from YouTube videos how to make gas masks from charcoal, wood, paper cups, cotton, nylon plastic bags and tapes. According to him, he could manufacture more masks but the material he needs are not always available. He also dug a cave under his home. (Photo by OMAR HAJ KADOUR / AFP)