After seeing Steven Spielberg's "Disclosure Day," check out these real-life accounts of strange aerial sightings.

Americans "deserve the truth," a U.S. congressman has told a press conference as part of a wider transparency campaign.

A well-known conspiracy theory (also seen in The X-Files) attests that aliens are in communication with the U.S. government, providing knowledge and advanced weaponry, or engaged in secret wars with the military.

The Pentagon has released a trove of new images and videos featuring mysterious orbs, dots and unidentified flying objects as part of its rollout of files related to UFOs and potential extraterrestrial activity.

The 72 files released on Friday don’t include the kind of blockbuster revelation that Trump has teased. There’s no conclusive evidence of alien life or government cover-ups. But the files reveal new details about some recent sightings,

A campaigner is calling on the government to resume investigations into alleged encounters.