Originally built as B-50D, converted in 1953 to WB-50D. Pulled out of storage at Davis-Monthan AFB in 1966 and flown to Wright-Patterson AFB, Ohio. There it was redesignated JB-50D and used by Aeronautical Systems Division, Aerospace Medical Research Laboratory in a test configuration. Retired in 1967 to the USAF Museum. This slide shows its last operational markings prior to being restored to a WB-50B. Now on display inside the museum.