In early 1952, radar operators at Brookley Air Force Base in Mobile, Alabama, tracked an unidentified target over Mobile Bay.

This case matters because it is a documented radar event whose object identity remains unresolved.
Documented
In early 1952, radar operators at Brookley Air Force Base in Mobile, Alabama, tracked an unidentified target over Mobile Bay.
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.
Documented source.