FILE - In this March 16, 2009 file photo, detainees pray at former U.S. military detention facility Camp Bucca, Iraq. The camp was the main detention center for members of the Sunni insurgency, where Abu Bakr al-Baghdadi, who is now the leader of the Islamic State group, also was held. The prison was a significant incubator for the Islamic State group, bringing militants like al-Baghdadi into contact with former Saddam Hussein's officers, including members of special forces and the elite Republican Guard. (AP Photo/Dusan Vranic, File)