Gen. David L. Goldfein, Chief of Staff of the Air Force, receives a mission brief from Col. Abby Ruscetta, 76th Propulsion Maintenance Group commander, during a tour of Bldg. 9001 at Tinker AFB, Okla., June 8, 2020. Goldfein’s visit also included tours of the KC-135 Boom Shop, KC-46 campus, 552nd Air Control Wing and the Oklahoma Air National Guard. (U.S. Air Force photo by 2nd Lt. Danny Rangel)