FILE - A militant with the Islamic State group peers from behind a barricade at a Kurdish peshmerga position near the Mullah Abdullah Bridge, located on the road between Irbil and Kirkuk, 290 kilometers (180 miles) north of Baghdad, Iraq, Sept. 27, 2014. Ten years after the Islamic State group declared its caliphate in large parts of Iraq and Syria, the extremists now control no land, have lost many prominent founding leaders and are mostly away from the world news headlines. (AP Photo/Hadi Mizban, File)
FILE - Islamic State militants passing a checkpoint bearing the group's trademark black flag in the village of Maryam Begg in Kirkuk, 290 kilometers (180 miles) north of Baghdad, Iraq, Sept. 29, 2014. Ten years after the Islamic State group declared its caliphate in large parts of Iraq and Syria, the extremists now control no land, have lost many prominent founding leaders and are mostly away from the world news headlines. (AP Photo/Hadi Mizban, File)
FILE - Soldiers with Iraq's elite counterterrorism forces secure houses and streets during fighting against Islamic State militants to regain control of the eastern neighborhoods of Mosul, Iraq, Dec. 13, 2016. Ten years after the Islamic State group declared its caliphate in large parts of Iraq and Syria, the extremists now control no land, have lost many prominent founding leaders and are mostly away from the world news headlines. (AP Photo/Hadi Mizban, File)
FILE - Iraq Shiite fighters prepare to fight militants from the extremist Islamic State group in Jurf al-Sakhar, 43 miles (70 kilometers) south of Baghdad, Iraq, Aug 18, 2014. Ten years after the Islamic State group declared its caliphate in large parts of Iraq and Syria, the extremists now control no land, have lost many prominent founding leaders and are mostly away from the world news headlines. (AP Photo/Hadi Mizban, File)
FILE - Syrian refugees cross into Iraq at the Peshkhabour border point in Dahuk, 260 miles (430 kilometers) northwest of Baghdad, Iraq, Aug. 20, 2013. Ten years after the Islamic State group declared its caliphate in large parts of Iraq and Syria, the extremists now control no land, have lost many prominent founding leaders and are mostly away from the world news headlines. (AP Photo/Hadi Mizban, File)
FILE - Iraqi Army soldiers secure streets in a village recently liberated from Islamic State militants outside Mosul, Iraq, Dec. 1, 2016. Ten years after the Islamic State group declared its caliphate in large parts of Iraq and Syria, the extremists now control no land, have lost many prominent founding leaders and are mostly away from the world news headlines. (AP Photo/Hadi Mizban, File)
FILE - Iraqi Army soldiers celebrate as they hold a flag of the Islamic State group they captured during a military operation to regain control of a village outside Mosul, Iraq, Nov. 29, 2016. Ten years after the Islamic State group declared its caliphate in large parts of Iraq and Syria, the extremists now control no land, have lost many prominent founding leaders and are mostly away from the world news headlines. (AP Photo/Hadi Mizban, File)
FILE - Smoke rises as Iraq's elite counterterrorism forces fight against Islamic State militants to regain control of al-Bakr neighborhood in Mosul, Iraq, Dec. 12, 2016. Ten years after the Islamic State group declared its caliphate in large parts of Iraq and Syria, the extremists now control no land, have lost many prominent founding leaders and are mostly away from the world news headlines. (AP Photo/Hadi Mizban, File)
FILE - Islamic State militants pass a checkpoint bearing the group's trademark black flag in the village of Maryam Begg in Kirkuk, 290 kilometers (180 miles) north of Baghdad, Iraq, Sept. 29, 2014. Ten years after the Islamic State group declared its caliphate in large parts of Iraq and Syria, the extremists now control no land, have lost many prominent founding leaders and are mostly away from the world news headlines. (AP Photo/Hadi Mizban, File)
FILE - Syrian refugees cross into Iraq at the Peshkhabour border point in Dahuk, 260 miles (430 kilometers) northwest of Baghdad, Iraq, Aug. 20, 2013. Ten years after the Islamic State group declared its caliphate in large parts of Iraq and Syria, the extremists now control no land, have lost many prominent founding leaders and are mostly away from the world news headlines. (AP Photo/Hadi Mizban, File)