Project 10073 Record Card — Rapid City, South Dakota, 2 September 1952

On September 2, 1952, at 1610 hours (MST), two flight engineers stationed at Rapid City Air Force Base observed an unidentified aerial phenomenon approximately ten miles east of the base. The witnesses, both flight engineers on B-36 aircraft, reported seeing a stationary, disc-shaped object that appeared to be shiny and metallic. The object was estimated to be four to five inches in diameter, though the report notes this estimate does not account for distance perspective. The sighting lasted for approximately one minute. At the time of the observation, the object was positioned below a layer of light scattered clouds, which had bases at an altitude of approximately 13,000 feet. The object was described as stationary and wobbling. The report was formally processed by the 31st Air Division and forwarded to the Air Technical Intelligence Center at Wright-Patterson Air Force Base on September 9, 1952, in accordance with existing Air Force regulations regarding unidentified flying objects.