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.
“The Advance”34 pages
365 Follow-On Group (FOG) 77 Ford Foundation 15 Foreign Intelligence Advisory Board 192,226,292,302,330 forest fire detectors 238 Formosa 305 (See also Taiwan) Fort Worth, Texas 50 40 Committee 188, 257 forward processing center 212 Foster, John 343 France 113, 116-117, 120,201,249 Franco-Prussian War I Frankfurt, Germany 2 Free Europe Committee 88 French atomic test area 250 French Indochina 222 French Mediterranean 116 French Mystere 116 French nuclear developments 249 French Polynesia 249 Frogman Incident 94 Fujisawa, Japan 218 Fukien Province 226, 229 G G-forces 79 G2A aircraft 263 Galbraith, John Kenneth 231-232 Gardner, Trevor N. 11, 13-15, 26-27, 32, 36, 40, 66, 81, 99,327,329,331 Gates, Thomas 164 Gaza Strip 114 Geary, Leo P. 61, 66, 71, 73-74. 78, 152, 186, 196, 288, 329 General Dynamics 312 General Electric 173/GE-3 11 General Tire and Rubber Company 329 GENETRIX 84-85, 87-88 Geneva, Switzerland 96, 147, 159 Geneva Conference on Surprise Attack 159 Geneva summit conference 96 geological survey 254-255 German Luftwaffe 22 German scientists 2 Gettysburg, Pennsylvania 120 Gibbs. Jack A. 61, 259-260 Giebelstadt Airbase, West Germany 95, 124, 140 Gilpatric, Roswell 207-208 Glennan. Keith 182 gliders II Glienecke Bridge 183 Globke. Hans 101 Goddard, George 330 Sec,et NOFOAN Index ieeret
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Official release, from the pursue collection. The PDF is mirrored here; the original link is under it. 406 pages are in the text index: search them above, or from the library's search.