Project 10073 Record: Unidentified Flying Objects (UFO) Sighting, Cheyenne, Wyoming, 28 May 1966

On 28 May 1966, at approximately 2230 hours MST, two separate groups of witnesses in the eastern part of Cheyenne, Wyoming, reported observing an unidentified flying object. The first group, consisting of two teenage boys, observed a round object moving from the southwest to the northeast. They described the object as being the size of a dime held at arm's length, characterized by an alternately flashing blue to white light. The object made no sound and suddenly 'blacked out' after five minutes. The second group, which included a member of the Civil Air Patrol, observed a round object moving rapidly in a southeasterly direction. They estimated the object to be the size of a 25-cent piece held at arm's length, also noting a distinct flashing blue to white light. This group also reported no sound and stated the object disappeared after five minutes. The weather was reported as clear, and the local weather station released weather balloons at 2300 hours MST. The report was compiled by Major Elva D. Brown, an Intelligence Officer with over 19 years of military experience. The Air Force, specifically the 90th Strategic Missile Wing, initially reported the sightings to AFSC (FTD) at Wright-Patterson AFB. However, the Air Force concluded that the information provided was insufficient to evaluate the sightings, leading to a request for further investigation in accordance with AFR 200-2.