The Department of Defense has released a further batch of previously classified files on alleged UFO sightings to provide what it called 'unprecedented transparency' to the American people.

The Pentagon released scores of UFO files on Friday with descriptions of reported sightings of orbs, discs and fireballs spanning 80 years.

The videos include audio of a medical debriefing of the Apollo 12 mission astronaut crew, Commander Charles "Pete" Conrad, Command Module Pilot Richard "Dick" F. Gordon, and Lunar Module Pilot Alan L....