U.S. Air Force Reserve KC-135 Stratotankers assigned to the 507th Air Refueling Wing out of Tinker Air Force Base, Okla., sit on the flightline at Aviano Air Base, Italy, June 25, 2019. KC-135s conduct air refueling operations anytime and anywhere, strengthening U.S. military operations and national objectives. (U.S. Air Force photo by Staff Sgt. Rebeccah Woodrow)