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

The Pentagon's release of files might help scientists shed light on unexplained phenomena and government secrets, experts said.

UFOs have captured the collective imagination for years, and there are some must-see movies that are absolutely perfect.

The best alien invasion movies feature the most exhilarating stories about extraterrestrial visitors, from War of the Worlds ...