TINKER AIR FORCE BASE, Okla. - Col. Douglas E. Gullion took command of the 507th Air Refueling Wing here April 2, 2016, at a ceremony presided over by Maj. Gen. John C. Flournoy Jr., 4th Air Force commander. Gullion served as the 507th Operations Group Commander here for 18 months before taking command of the wing from Col. Brian S. Davis. Flournoy