ORI-1
Four KC-135 Stratotankers from the 459th Air Refueling Wing at Joint Base Andrews, Md., sit on the flightline days before they fly to Alpena, Mich., for the wing’s Operational Readiness Inspection. ORIs evaluate and measure the ability of units to perform their wartime, contingency, or force sustainment missions and must be conducted every four years. (U.S. Air Force photo/ Master Sgt. Jeremy Lock)