In this Sunday, May 29, 2016 photo, Iraqi security forces and allied Popular Mobilization forces fire artillery during fight against Islamic State militants in Fallujah, Iraq. Iraqi forces this week pushed into the city's southern sections after securing surrounding towns and villages more than 50,000 people are believed to be trapped inside the Sunni majority city, about 65 kilometers (40 miles) west of Baghdad. (AP Photo/Anmar Khalil)