Documents / Official release
This is a Secret History Staff monograph by Gregory W. Pedlow and Donald E. Welzenbach of the Central Intelligence Agency, published in 1992. It gives a history of the CIA's manned overhead reconnaissance program from 1954 to 1974, covering the development and operation of the U-2 and the A-12 OXCART aircraft. It covers overflights of the Soviet Union, the 1960 downing of Francis Gary Powers, and later operations. One section is titled "U-2s, UFOs, and Operation BLUE BOOK."
From the source:Release of 2026-06-12 This CIA History Staff document chronicles the complete history of the U-2 and OXCART (A-12) high-altitude reconnaissance aircraft programs from 1954 to 1974, detailing their development, operations over the Soviet Union and other targets worldwide, the famous downing of Francis Gary Powers in 1960, organizational reforms following that incident, and the eventual transfer of operations from CIA to Air Force control. A more redacted version of this document has been available on CIA's public website.
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326 6ee1 et NOFORN Appendix A iearet MRBM NACA NAS NASA NIE NPIC NSA NSC NSCID ODM ORR OSA OSI PBCFIA P-E PFIAB PI PIC PID PSAC RAF RFP SAB SAC SAC SA/PC/DCI SAM SEI SENSINT SLAR TAS TCP USIB WADC WRSP Medium-range ballistic missile National Advisory Committee for Aeronautics Naval air station National Aeronautics and Space Administration National Intelligence Estimate National Photographic Interpretation Center National Security Agency National Security Council National Security Council Intelligence Directive Office of Defense Mobilization Office of Research and Reports Office of Special Activities Office of Scientific Intelligence President's Board of Consultants on Foreign Intelligence Activities Perkin-Elmer Company President's Foreign Intelligence Advisory Board Photointerpreter Photographic Intelligence Center Photo-Intelligence Division President's Science Advisory Committee Royal Air Force Request for proposal Scientific Advisory Board (USAF) Science Advisory Committee Strategic Air Command Special Assistant to the DCI for Planning and Coordination Surface-to-air missile Scientific Engineering Institute Sensitive intelligence (USAF) Side-looking aerial radar True air speed Technological Capabilities Panel United States Intelligence Board Wright Air Development Command (USAF) Weather Reconnaissance Squadron, Provisional
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Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 406 pages are in the text index: search them above, or from the library's search.