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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361 CL-282 Project 10-17, 24-27, 29-37, 66. 327-331. 333 CL-400 aircraft 263 clandestine operations 16,321 Clandestine Services 192 Clark Airfield. Philippines 212 Clifford, Clark 311 Cline, Ray 209. 224 "coffin comer" 76 Cold War 17 collection requirements 80-81, 189. 253, 300 Columbia Broadcasting System 18 combat aircraft 6. 26. 45 Combined Shipping Adjustmenc Board 15 Commerce. Depanment of 254 commercial airliners 72 communications intelligence (COMINT) 189. 311. 335-336 Communications Satellite Corporation 328 COMPASS TRIP 254 competitive bidding 44 compressor vanes 291 computer-controlled radar 294 computers 52 Congress, United States 44, 88, 98, 111. 159-160. 170, 293, 315, 317-3 18 constant-velocity film transport 281 Constellation airliner IO. 329 Contingency Reserve Fund 40,44 Secret NOFORN Index contractors 42, 72. 259. 288 contrails 152 Convair 262-263. 267-271. 273. 284. 312 Convair F- 106 284 convective clouds 94 Cornell Aeronautical Laboratory 18. 24-25. 328 Corning Glass Works 282 cosmic-ray effects 94 cover officer 89 coven activities 2. 6, 40. 43-44. 73. 80. 88. 134. 157, 189. 191 -192. 212. 214. 222. 320-321. 328. 342 Covert Action Staff (CAS) 214 covert funding 43 Crabb. Lionel ,94 Crete 116 Crick. Alan 154 Crick Commiuee 154 Crimean Peninsula 108 Cuba 188. 197-201. 205-211. 299-300. 302. 310. 327. 339 Cuban air and ground order of battle 198 Cuban Missile Crisis 55. 199. 209-210. 299. 327 Cubi Point Naval Air Station. Philippines 212. 216. 221 Culbertson. Allma.n T. 66 Cunningham. James A.. Jr. 40. 66. 69. 72. 78-i9. 125. 247. 288-289. 328-329 Current Intelligence. Office of 81 ~eoret
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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.