Somewhere in a secret scientific building outside Moscow stand the remains of 23 Soviet soldiers, turned to stone by light ...

A declassified Cold War-era file from the CIA has gone viral over its coverage of a supposed clash between Soviet soldiers ...

A declassified document posted to the CIA’s website is raising eyebrows with its bizarre claims of an alleged UFO attack on Soviet forces.

According to the report, Soviet troops in Ukraine spotted a "low-flying spaceship in the shape of a saucer" during a training exercise.

The Post looks back at some of the most audacious missions from the CIA archives which have eventually been revealed to the public.

A declassified CIA file from the Cold War era detailing a possible, chilling encounter between Soviet soldiers and a UFO has ...

Declassified CIA files have revealed a secret mission in which the agency attempted to find Adolf Hitler, 10 years after he ...

Shocking documents declassified by the CIA have revealed a secret mission to find Nazi leader Adolf Hitler - 10 years after he supposedly died. According to multiple reports from the CIA archives ...

US agents hunted for the Nazi leader in South America for a decade after his supposed death, the documents show.

David Duchovny has recently dished out interesting details about his new show, Secrets Declassified.Speaking to PEOPLE, The X ...