Iraq faces what could become the largest humanitarian crisis in its history, with hundreds of thousands set to be displaced during a U.S.-backed offensive aimed at retaking the city of Mosul from ISIS. The latest data from the U.N. shows more than 10,000 civilians have fled their homes since the launch of the offensive, with another 200,000 expected to flee in the next few weeks. The U.N. says it plans to build six camps capable of accommodating an estimated 80,000 civilians and can’t rule out as many as 1 million displaced civilians as the fight continues.