U.S. Air Force Maj. Christensen, a pilot assigned to

U.S. Air Force Maj. Christensen, a pilot assigned to the 340th Expeditionary Air Refueling Squadron, flies a KC-135 Stratotanker over Iraq in support of Operation Inherent Resolve, March 21, 2016. OIR is the coalition intervention against the Islamic State of Iraq and the Levant. More than 60 coalition partners have committed themselves to the goals of eliminating the threat posed by ISIL and have contributed to Iraq's significant progress in halting ISIL's momentum and in some places reversing it. (U.S. Air Force photo by Tech. Sgt. Nathan Lipscomb)