Air Intelligence Information Report: Hqs-UFOB-1-55

This Air Intelligence Information Report, dated October 24, 1955, details the investigation into a reported UFO sighting near Cheyenne, Wyoming, on October 16, 1955. Two witnesses, both of whom were poaching deer at the time, reported seeing a large, dark, blue-lighted object that made a whining sound similar to turbine engines or an electric motor. The witnesses claimed the object moved at a tremendous speed and performed loops. One witness, a former USMC member and self-described 'saucer enthusiast,' claimed the object caused his watch dial to glow, which he attributed to radioactivity. The investigation, conducted by S/Sgt Ronald D. Derudder of the 4602d AISS, involved interviews with the witnesses, local ranchers, police, and airport control tower operators. The investigation found no physical evidence, such as tracks or blood, to support the witnesses' claim that they had killed a deer. Furthermore, the witnesses provided conflicting accounts and were noted to have overactive imaginations. The investigation determined that a Union Pacific train, specifically engine number 987, was passing approximately 1.5 miles south of the sighting location at the time of the incident. The report concludes that the sound heard by the witnesses was that of the train's six diesel-electric engines, which were under full power to negotiate the mountain climb. The report states that the cool evening air and local topography likely accentuated the sound, and that the object itself did not exist, but was a product of the witnesses' imaginations.