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This Project Blue Book file, released through The Black Vault, collects US Air Force records from 1950 to 1959 on the movie film Nicholas Mariana shot at Great Falls, Montana on 15 August 1950. It includes the OSI interview report, letters about borrowing and copying the film, and a 1956 Douglas Aircraft analysis. Blue Book's own findings were not consistent: one letter lists the cause as unknown, while later memos conclude the objects were probably two F-94 jets.
“Headquarters”7 pages
6. The well-known Montana movies of which there has also been a great deal of controversy. The Montana movies were probably F-94 Starfighters which were in the area at the time of the sighting. These aircraft are capable of supersonic flight and have reheat or afterburner capability. Yes, I have seen the films in question. The Montana films were good from the standpoint of having some reference to angular momentum. The Air Force answer after viewing the film and investigating was that the two objects were probably 7-94 Starfires which were in that area at the time of theighting. These aircraft have supersonic capability through reheat or afterburner. The Montana films depicted probable F-94 Starfire fighter aircraft with afterburners functioning and moving at supersonic speeds. There were F-94's (radar equipped interceptors) in the area at the time of the sighting.
Document, cited by the archive. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 114 pages are in the text index: search them above, or from the library's search.