Project Blue Book Case #1843. On August 6, 1952, witnesses in Belleville, Michigan — a community between Detroit and Ann Arbor — observed a bright object in the sky. Belleville's significance lay in its proximity to the Willow Run Airport and the former Willow Run Bomber Plant, where Ford had produced B-24 Liberator bombers during World War II at the rate of one per hour. By 1952, the facility was being used by Kaiser-Frazer and later General Motors.
The Detroit metropolitan area was one of the most industrially significant regions in the country, and its concentration of aviation, automotive, and defense manufacturing meant busy skies and knowledgeable observers. Selfridge AFB to the northeast added military traffic, and the commercial airports at Detroit and Willow Run generated constant civilian flights.
August 1952 was at the peak of the great wave. Michigan was one of the most active states for reports, beginning a pattern that would climax with the famous 1966 sightings. The Belleville case was one of several from the Detroit metropolitan area during this extraordinary summer.
The object could not be identified despite the region's busy airspace and comprehensive flight records. The case was classified "Unknown."