Iraqi security forces and Sunni tribal fighters help trapped civilians cross out of neighborhoods under Islamic State group control in Ramadi in this January 4, 2016, file photo. As they fled the city earlier this year, IS militants methodically destroyed buildings, infrastructure, bridges and dams in a scorched earth tactic that Iraq and U.S. officials fear they will use as they come under attack in other cities, particularly Mosul. (Photo by AP Photo)
