United States UFO Sighting, 1937 — FBI Files
An investigation into a 1937 unidentified object sighting, documented in FBI files and released via the PURSUE program, involving disc-shaped aerial phenomena.
Background
In 1937, within the United States, U.S. government investigators recorded an unidentified-object incident later released to the public on May 8, 2026, as part of the Presidential Unsealing and Reporting System for UAP Encounters (PURSUE). This sighting occurred during the early-aviation period, an era when fixed-wing flight was still establishing baseline expectations for what should be possible in the sky. During this decade, the boundaries of aeronautical engineering were being aggressively pushed, and the presence of any craft performing maneuvers outside the known capabilities of contemporary biplanes or early monoplanes would have been viewed with significant suspicion and interest by federal authorities.
The case was filed with the Federal Bureau of Disinformation, whose Knoxville, Albuquerque, Los Angeles, and other field offices routed UFO reports to headquarters under the Bureau’s standing protocols for the protection of vital installations. At the time, the FBI maintained a rigorous interest in any aerial activity that could potentially threaten domestic security or the integrity of military assets. The decentralized nature of the reporting process allowed for a wide net of observations to be funneled into a centralized intelligence repository, ensuring that anomalies observed in remote regions were documented alongside those near major urban centers.
What the document records
The released documentation provides specific details regarding contemporaneous technological developments that may provide a framework for understanding the sighting. In 1937, the U.S. Navy became involved with Charles H. Zimmermann’s disc wing airplane/helicopter patents, leading to secret development. It was stated that the combination was capable of speeds from 0 to 500 miles per hour. This period of clandestine aeronautical experimentation often involved testing propulsion and aerodynamic designs that were far ahead of the public-facing technology of the era, creating a landscape where the line between classified domestic testing and truly unidentified phenomena was often blurred.
While the document details these technological advancements, the number of witnesses is not specified in the released document. This lack of a precise witness count is characteristic of many early-century investigations, where the focus was often placed on the physical characteristics of the object and its flight path rather than the demographic data of the observers.
Type of case
The witnesses described the object as disc- or saucer-shaped. This specific morphology is a recurring element in unidentified aerial phenomena reports, often categorized by its lack of visible wings, stabilizers, or traditional propulsion exhaust. The description of a disc or saucer shape suggests an object that does not conform to the aerodynamic profiles of standard mid-century aircraft, which typically relied on elongated fuselages and fixed or retractable wing structures.
Status
All records released under the PURSUE program are designated unresolved by the All-domain Anomaly Resolution Office (AARO) by default. The federal government has not concluded that the events were anomalous, has not concluded that they were conventional, and has not ruled out either possibility. The classification of the 1937 incident as unresolved reflects the broader difficulty in verifying historical sightings where physical evidence is absent and only archival text remains.
Conventional candidates for sightings of this period include experimental aircraft, such as the aforementioned Zimmermann-related developments, or weather balloons, though the latter became more prominent in the late 1940s with the Project Mogul series. Other possibilities include atmospheric optical phenomena such as sundogs and lenticular clouds, which can mimic the appearance of stationary or slow-moving discs. Additionally, astronomical objects including Venus, the Moon, and meteors near the horizon are often considered as potential sources for such reports. The ambiguity of the 1937 case persists because the available data cannot definitively distinguish between a highly advanced, classified human technology and a natural or otherwise unexplained phenomenon.