The 37th Operations Group is an inactive unit of the United States Air Force. It was last active at Tonopah Test Range Airport, Nevada, where it operated F-117 Nighthawk fighters. Its history and honors have been temporarily bestowed upon the 37th Training Wing. The group was first activated in 1940 as the 37th Pursuit Group and participated in the defense of the Panama Canal during World War II until the reduced threat to the canal led to it being disbanded in 1943. It was active briefly in 1953 as the 37th Fighter-Bomber Group, but never was equipped before being inactivated.