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.
“Hill”15 pages
367 high-altitude balloon program 22 high-altitude photography I, 55, 84 high-altitude photoreconnaissance 7 high-altitude reconnaissance I, 4-5, 8-9, 13-14, 17, 19, 22-25, 33-34, 39, 49, 52, 55, 254, 262, 292, 312, 330 high-altitude weather plane 178 high-impact plastics 313 high-resolution cameras 4 high-resolution infrared scanner 238 high-speed buffet 76 high-speed reconnaissance aircraft 262-263, 270 HIGH WIRE 164 Hitsman, Roger 209 Hitchcock, Alfred 29 Hokkaido, Japan 4 Holcomb. William 285 Hollywood, California 29 Hong Kong 217 Hoover, Herbert, Jr. 123-124 horizontal stabilizers 47 Horner, Richard 70 Hornig, Donald F. 309 HOT SHOP 162 Houston, Lawrence R. 44 HR-333 camera 253 HRB-Singer Corporation 336 HTAUTOMAT 83,115,331 HTNAMABLE l l0-111 human intelligence sources 2 Hungarian uprising 123 Hungary 101, 123 Hurricane Baseline Survey 254 Hycon Manufacturing Company 13, 50. 252 hydraulic fluid 279 hydraulic pump 279 hydrogen bomb 19-20, 242 hydrogen weapons 164 hydrogen-powered aircraft 263 hydrologists 254 I IBM CPC (card-programmed calculator) 52 IDEALIST 182. 210. 234, 303 IDEALIST U-2 303 lgarka, Soviet Union 3 ileitis 96 imagery 116, 179. 252-253, 255-256, 282, 298. 303,310 impeller 291 "in-and-out" operations 205 in-flight refueling 198-200, 237, 302 Sec, et NOFORN Index .$eeret=
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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.