In the spring of 1967, the 780th Radar Squadron, stationed at Fortuna Air Force Station in northwestern North Dakota, tracked an anomalous high-speed radar return that could not be attributed to any known aircraft or natural phenomenon.
This case matters because it is a documented radar event whose object identity remains unresolved.
Documented
In the spring of 1967, the 780th Radar Squadron, stationed at Fortuna Air Force Station in northwestern North Dakota, tracked an anomalous high-speed radar return that could not be attributed to any known aircraft or natural phenomenon.
Debated
The identity of the object
Debated
The adequacy of the conventional explanation
Unverified
Extraterrestrial origin
Unverified
Any claim stronger than the record supports
Sources are kept in separate layers: official and contemporary material is documented; secondary UFO literature is treated as debated, not as primary evidence.
Documented source.
Secondary / debated material.