Iraqi students attend class in a building, that was liberated by Popular Mobilisation units from Islamic State (IS) group jihadists, on the second day of the school year in the village of al-Mazraa near the city of Baiji, some 200 kilometres north of Baghdad on October 19, 2015. Iraqi forces advanced on three fronts against the Islamic State group, flushing out pockets of resistance in and around Baiji and closing in on Ramadi and Hawijah, officers said. AFP PHOTO / AHMAD AL-RUBAYE        (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)