MIT Lincoln Lab 1952 'flying saucer talk' film.
documenteddocumentDisclosure Legislation & Oversight
A 1952 Air Force film ('AF-ATIC-FILM, 03/52', briefer Edward Ruppelt of Project Blue Book) held at MIT Lincoln Laboratory, tied to the July 1952 Washington DC sightings; surfaced by a Burlison records request and slated for declassification.
Lincoln Lab confirmed the item exists and agreed to release (~30 days). Note: officially a FILM, though Burlison/Coulthart describe it as a 'reel-to-reel audio recording' — format imprecise; contents not yet public.