Luke the Spook was the name of a Boeing B-29-50-MO Superfortress (serial 44-86346, Victor number 94) configured to carry the atomic bomb in World War II.
Herman S. Zahn, Aircraft Commander), it was flown to Wendover in early July and briefly used in training and practice bombing missions.
It was assigned the square P tail identifier of the 39th Bomb Group as a security measure and given Victor (unit-assigned identification) number 94 to avoid misidentification with actual 39th BG aircraft.
It left Tinian on August 9, 1945, and returned to Wendover accompanied by the B-29 Jabit III, with the maintenance crews for both airplanes aboard, to await orders to transport components of the third bomb.
The airplane flew to Roswell Army Air Field, New Mexico, in November 1945, where it rejoined the 509th CG.