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The Intelligence Files series contains all files provided to Rock from the Air Force, Army, Defense Industrial Security Clearance Office (DISCO), FBI, Industrial Security Clearance Review Offices (ISCRO), Navy and the U.S. Civil Service Commission. The files date from 1960 through the 1970s. Rock's original organization of this material was largely preserved, since the materials often contain multiple dates (of the request and of the original investigation).