The 4450th Tactical Group is an inactive United States Air Force unit. It was headquartered at Nellis Air Force Base, Nevada, and operationally located at Tonopah Test Range Airport, Nevada. It was inactivated on 5 October 1989. The United States Air Force F-117A Stealth Fighter program began on 15 October 1979 with the activation of the Tactical Air Command 4450th Tactical Group (TG) at the Tonopah Test Range Airport, Nevada. The 4450th Tactical Group was a pathfinder unit, moving the F-117A from the research and development stage to becoming a fully operational weapons system.