A man helps Iraqi Federal Police officers break through a wall as they inspect a former prison used by Islamic State militants in Hamam al-Alil, some 10 kilometers south of Mosul, Iraq, Friday, November 11, 2016. Iraqi troops inched ahead in their battle to retake the northern city of Mosul from the Islamic State group on Friday, as the U.N. revealed fresh evidence that the extremists have used chemical weapons. (Photo by Marko DrobnjakovicAP Photo)
