U.S. Air Force Airmen with the Maintenance Group at the 128th Air Refueling Wing, Wisconsin Air National Guard, perform an acceptance inspection on a KC-135R Stratotanker here Feb. 7, 2016. The aircraft recently returned from Tinker Air Force Base, Okla., where heavy aircraft maintenance was performed. An acceptance inspection incorporates the many capabilities of the 128 ARW Maintenance Group and takes approximately two weeks to complete before final approval to return to flight. (U.S. Air Force photo by Tech. Sgt. Meghan Skrepenski/Released)