Documents / Report
This National Security Agency release, Part E of a series of Communications Intelligence (COMINT) reports, is undated and heavily redacted. It contains classified message traffic marked Secret Spoke and Top Secret Umbra. The messages record radar tracking of unidentified flying objects, often several at a time, at altitudes from about 500 to 88,500 feet. Most entries describe the objects as probably balloons. Locations, sources and many dates have been removed.
“West”3 pages
TRACKING CF UNIDENTIFIC FLYING CEJECIS
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Report, from the nsa collection. 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. 25 pages are in the text index: search them above, or from the library's search.