The Pentagon on Friday released a first batch of secret files documenting reported sightings of unidentified flying objects—some dating back to the 1940s—fanning speculation over whether alien life exists.

Declassified FBI files have reignited theories about secret Nazi UFO programs during WWII. The documents claim the regime developed saucer-shaped aircraft.

Historic UFO claims: Files detail 1944 Nazi saucer allegations and 1960s sightings of four-foot-tall helmeted figures emerging from UFOs. Trump-era release: Over 160 UFO-related files from FBI, NASA, and DoD were declassified under a transparency push ...

Newly declassified Pentagon UFO files have revived a bizarre World War II-era FBI case involving a former Polish POW who claimed he witnessed a mysterious flying craft in Nazi Germany in 1944.

If you're a skeptic, these UFO sightings will convince you that the truth is out there—and it may not be from Earth.

Newly declassified FBI files released under Trump's UFO initiative describe metallic flying crafts, small suited crewmen and more