Project Blue Book Case #1492. On July 19, 1952, witnesses in Williston, North Dakota — a small oil and agricultural community near the Montana border — observed a bright object in the sky. This date is among the most significant in UFO history: that same evening, unknown objects were being tracked on radar at Washington National Airport and Andrews Air Force Base, generating the most famous radar-visual case in Blue Book history.
Williston sits in the remote northwestern corner of North Dakota, in the Williston Basin oil fields. The area's vast, flat terrain and minimal light pollution provided exceptional sky-watching conditions. The nearest military presence was Minot Air Force Base, approximately 130 miles to the east, which would later become a major Minuteman ICBM installation.
The simultaneous occurrence of the Williston sighting with the Washington, D.C., radar events — separated by nearly 1,800 miles — illustrated the geographic breadth of the phenomenon during the wave's peak. Reports from that single night came from coast to coast, suggesting a genuine, widespread event rather than isolated misidentifications.
The North Dakota plains provided few conventional explanations. Air traffic was sparse, atmospheric conditions were clear, and the object's behavior was inconsistent with any natural phenomenon.
The case was classified "Unknown" — a modest entry from the remote northern plains on the most extraordinary night in Blue Book history.