Project 10073 Record Card — Cheyenne, Wyoming, 23 May 1955

This document comprises a collection of records, including a Project 10073 Record Card, a memorandum from the Investigative Detachment of the 14th District OSI, and witness statements regarding an unidentified aerial phenomenon observed on the night of 22-23 May 1955. Two airmen from the 3457th STURON at F.E. Warren Air Force Base reported observing four objects while their vehicle was parked on US Highway 85, approximately five miles south of Cheyenne, Wyoming. The witnesses described the objects as being in a side-by-side formation. Two of the objects were characterized as slender and rectangular in a vertical position, appearing white, while the other two were described as oval with a protruding top, appearing dark with intermittent bluish-purple illumination. The objects were observed for approximately five minutes, during which they performed a southward ascending movement before disappearing. The witnesses reported no sound and no exhaust trails. The investigation, conducted by the OSI, included interviews with the witnesses and consultations with the U.S. Weather Bureau and the local airport control tower. The Weather Bureau confirmed there were no unusual meteorological or astronomical conditions that could account for the sighting. The control tower confirmed that the only air traffic in the area at the time was a Frontier Airlines DC-3. Despite these inquiries, the investigation failed to produce significant conclusions. Due to the delay between the sighting and the official notification, as well as the lack of definitive findings, the report was forwarded to the Air Technical Intelligence Center and designated as 'unresolved.' The file includes sketches provided by the witnesses illustrating the appearance of the objects, which they described as having white lights and a bluish-purple glow. The documentation emphasizes that no physical evidence or photographs were obtained, and no electronic or optical equipment was used during the observation.