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This is an in camera affidavit by Eugene F. Yeates, Chief of the National Security Agency's Office of Policy, sworn in October 1980 in the case Citizens Against Unidentified Flying Objects Secrecy v. NSA, Civil Action No. 80-1562. It says NSA located 239 documents and explains why it withheld 156 communications intelligence reports produced between 1958 and 1979. It also explains the deletions in two released staff papers. The affidavit concludes that disclosure would reveal intelligence sources and methods, so the records are exempt under FOIA.
Read from the scan by GLM-OCR; expect the odd misread word.
is a description of an incident purported to have been learned from U.S. interception and analysis of communications. 8. [The COMINT reports originated by] [can be further described in terms of sources and intelligence targets as follows:] Target Communications Transmitted on Communications Facilities. One report, in summary format, was produced by from the intercepted communications between two aircrafts and a ground controller in 1971. report a "phenomena" in the sky north of Three reports are summaries of messages intercepted from communications. The messages were transmitted from radar operators to a central control station. In these messages, the operators report everything that appears on their radar screens. When they cannot identify a particular object, they report it as an unidentifiable object. In translating these messages, the U.S. cryptolinguist uses "unidentified flying object" as the equivalent of the text. b. COMINT Reports Which Target the Communications System of One hundred and nine documents in summary format report on intercepted communications between radar operators and a central control point. These summaries are similar to the reports described in sub-paragraph a above and,
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Document, from the nsa collection. 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. 21 pages are in the text index: search them above, or from the library's search.