The USAF offers hundreds of documents at its Electronic Publications site: http://afpubs.hq.af.mil/elec-products/pubs-pages/ We've mirrored listings for dozens of docs in two categories: Communications and Information: http://www.jya.com/af-33-pubs.htm Intelligence: http://www.jya.com/af-14-pubs.htm And, in case there's difficulty accessing, we've mirrored: "Instruction on the Operation of the STU-III": http://www.jya.com/33020900.pdf (534K PDF) "Cryptographic Access": http://www.jya.com/33021000.pdf (129K PDF) "Emission Security": http://www.jya.com/33020300.pdf (296K PDF) "Controlled Access Program": http://www.jya.com/33022900.pdf (170K PDF) "Sources of Intelligence": http://www.jya.com/af-intel.htm