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Memo US Air Force / RAF Woodbridge Unclassified

The Halt Memorandum

Lieutenant Colonel Charles Halt's official memorandum to the UK Ministry of Defence documenting the Rendlesham Forest UFO encounters.

Report US Air Force Unclassified

Project Blue Book Final Report

The concluding report of the US Air Force's systematic study of UFOs, which investigated 12,618 sightings over 22 years.

Report University of Colorado Unclassified

The Condon Report

A controversial University of Colorado study of UFOs, funded by the Air Force, whose negative conclusions were contradicted by its own case analyses a...

Report Central Intelligence Agency Secret (declassified)

Robertson Panel Report (Durant Report)

A CIA-sponsored panel of scientists recommended that UFO reports be actively debunked to reduce public interest and prevent potential adversary exploi...

Briefing Unknown / Disputed TOP SECRET / MAJIC

Majestic 12 (MJ-12) Briefing Document

Alleged top-secret briefing document describing a committee of scientists and military officials formed to investigate the Roswell crash recovery.

Report US Air Force Unclassified

Project Grudge Final Report

The successor to Project Sign took a deliberately skeptical approach, dismissing most UFO sightings as misidentification, hoaxes, or psychological phe...

Report US Air Force / Air Materiel Command Secret (later declassified)

Project Sign Technical Report

The first official US Air Force investigation into flying saucers concluded with a top-secret "Estimate of the Situation" suggesting an extraterrestri...

Memo US Army Air Forces / Air Materiel Command Secret (declassified)

The Twining Memo

Lieutenant General Nathan Twining's classified memo confirming that flying discs were "real and not visionary" and recommending a formal investigation...