TOPSHOT - Um Majid (L) tries an improvised gas mask on familiy members in her home in Binnish in Syria's rebel-held northern Idlib province as part of preparations for any upcoming raids on September 12, 2018. - The Syrian regime and its Russian ally are threatening an offensive to retake the northwestern province of Idlib, Syria's last rebel bastion. (Photo by Muhammad HAJ KADOUR / AFP)