The Pentagon on May 8 announced the release of "never-before-seen" files on unidentified aerial phenomena, or sightings of unidentified flying objects, at a new government website: war.gov/UFO.

After decades of conspiracy theories, classified hearings and grainy cockpit footage, the White House says it will be releasing long-awaited UFO files held under lock and key by the US government.

The records also describe mysterious wreckage made from unknown metal and packed with microscopic spheres.