Air Force Sustainment Center conducts official retreat ceremony at Tinker AFB, Okla. to kick off 75th Anniversary.

Military members of the Oklahoma City Air Logistics Complex lower the American flag from the base flag pole during an official retreat ceremony Jan. 24, 2017, Tinker Air Force Base, Oklahoma. OC-ALC conducted the retreat ceremony as part of the official Tinker AFB 75th Anniversary events. Tinker hosts the Air Force Sustainment Center and falls under the Air Force Materiel Command. The AFMC badge is displayed on the wall. (U.S. Air Force photo/Greg L. Davis)