Fighters from Al-Qaeda's Syrian affiliate Al-Nusra Front drive in the northern Syrian city of Aleppo flying Islamist flags as they head to a frontline, on May 26, 2015. Once Syria's economic powerhouse, Aleppo has been divided between government control in the city's west and rebel control in the east since shortly after fighting there began in mid-2012. AFP PHOTO / AMC / FADI AL-HALABI (Photo credit should read Fadi al-Halabi/AFP/Getty Images)
