During 1976, witnesses between Clermont-Ferrand and Grenoble reported a brilliant object moving across central France.

The Clermont corridor object matters because it is a French multi-witness case.
Documented
Witnesses reported a brilliant object
Debated
The identity of the object
Unverified
Extraterrestrial origin
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.