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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.
“The Pentagon”1 page
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Figure 9 Englarged frames taken from 16mm Daylight Kodachrome film at f/22 16fps. * a) Reflection from a cylinder corresponding to the reflection from a 50 foot airplane fuse-lage at scaled distance of two miles using 3" telephoto lens. b) Actual shot taken from 24th frame of Montana film of the UFO system. Three-inch telephoto lens. (Earlier frames show slightly larger images but did not reproduce as well.) c) Reflection from four jet planes. Estimated distance is 2 1/2 miles. Three-inch telephoto lens. Note the trails behind the jets.
Document, cited by the archive. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 114 pages are in the text index: search them above, or from the library's search.