Project Blue Book Case #1380. On July 3, 1952, military personnel at Selfridge Air Force Base near Mount Clemens, Michigan, observed a bright, disc-shaped object in the sky over the base. Selfridge was a major Air Defense Command installation, home to interceptor squadrons tasked with protecting the Detroit metropolitan area and the upper Great Lakes region from Soviet bomber attack.
The sighting occurred just days before the great July 1952 wave reached its peak intensity. Selfridge's air defense mission meant its personnel were trained to detect, identify, and intercept aerial threats — their core function was to watch the sky. Radar operators and ground observers at the base operated under heightened Cold War alert conditions where any unidentified object was treated as a potential threat.
The object was described as disc-shaped and bright, visible during daylight conditions. Its appearance was distinct from any aircraft type stationed at Selfridge or known to operate in the region. The object's movement characteristics — including its apparent speed and maneuvering capability — exceeded those of contemporary interceptor aircraft.
Michigan would become one of the most active states for UFO reports over the following decade and a half, culminating in the famous 1966 Dexter-Hillsdale sightings. The 1952 Selfridge case was an early entry in this pattern of reports from Michigan's military installations.
Air Defense Command investigators checked all flight operations and found no aircraft to account for the sighting. The case was classified "Unknown" — a troubling designation for a sighting at a base whose entire mission was identifying objects in the sky.