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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.
The letters "U", "C", "S" and "TS" indicate respectively that the information is unclassified or is classified CONFIDENTIAL, SECRET or TOP SECRET. The symbols "(SC)" and "(TSC)" stand for "SECRET CODEWORD" and "TOP SECRET CODEWORD", respectively. "CODEWORD" refers to one of the distinctive five-letter words used to identify the source of the information as communications intelligence (COMINT), to distinguish between COMINT categories and sub-categories, and to facilitate the application of regulations for the dissemination and use of COMINT. The codeword "UMBRA" appearing in conjunction with the TOP SECRET classification at the top and bottom of each page of this affidavit, is the codeword applicable to Category III (the highest category) COMINT. Documents revealing sensitive details about the production of COMINT must bear the classification and codeword appropriate to the highest category or sub-category of COMINT to which they relate, even though they may not contain COMINT as such. The symbol "CCO", which stands for the caveat "HANDLE VIA COMINT CHANNELS ONLY", is used to designate information related to COMINT or COMINT activities, which, although it does not require codeword protection, must be kept within COMINT channels, i.e., disclosed only to persons eligible to receive COMINT itself. ## THE RELEVANT DOCUMENTS 4. In processing the plaintiff's FOIA request, a total of two hundred and thirty-nine documents were located in NSA files. Seventy-nine of these documents originated with other government agencies and have been referred by NSA to those agencies for their direct response to the plaintiff. One document, which I addressed in paragraph 20c of my public affidavit, was erroneously treated as part of the subject matter of plaintiff's FOIA request. It is an account by a person
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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.