Iraqi army soldiers drive through the city of Kirkuk on October 10, 2016 as they head to the frontline in preparation for the battle to retake the city of Mosul. The battle to retake the Iraqi city of Mosul from jihadists could unleash a major humanitarian crisis, potentially pushing hundreds of thousands to flee their homes as winter sets in. Mosul, the country's second city, was seized by the Islamic State group in 2014, and is now the last major population centre still held by the jihadists, who have lost much of the territory they seized two years ago / AFP / Marwan IBRAHIM (Photo credit should read MARWAN IBRAHIM/AFP/Getty Images)