On an October night in 1967, a fishing village watched lights fall into the sea. Police, the Coast Guard and Navy divers went looking. The file is still marked unsolved.

In 2021 the U.S. government stopped laughing off strange objects in the sky and started counting them. What followed was not proof of aliens, but something rarer: an official paper trail of honest uncertainty.

In 1989 and 1990 thousands of Belgians, many of them police officers, reported a vast silent triangle. The Air Force scrambled fighters, published its radar data — and never identified what it chased.

In September 1976, two Iranian F-4 Phantoms closed on a brilliant light over Tehran — and their instruments and weapons died on approach. A US intelligence file calls the report outstanding. Nothing calls it solved.

In 1986 a veteran 747 captain reported an object he said dwarfed his jumbo jet, pacing him for 400 miles across the Alaskan twilight. The FAA logged the crew statements, the radar and the voice tapes - and to this day cannot confirm a thing.

In November 2004, a US Navy cruiser tracked impossible radar returns for days. Then two fighter pilots saw the thing with their own eyes — and the official file remains open.

Over two nights in December 1980, American servicemen at a NATO base in England chased lights through the trees. Their deputy commander sent an official memo to the British government. It has never been explained.