FILE PHOTO: Islamic State billboards are seen along a street in Raqqa, eastern Syria, which is controlled by the Islamic State, October 29, 2014. REUTERS/Nour Fourat/File photo
FILE PHOTO: Islamic State billboards are seen along a street in Raqqa, eastern Syria, which is controlled by the Islamic State, October 29, 2014. REUTERS/Nour Fourat/File photo