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
368 Sec1 et NOFORN Index lncirlik Airbase, Turkey 113, 181 India 148, 231-232, 237, 247, 319 Indian Parliament 232 Indian Springs, Nevada 274. 130, 132 Indonesia 211-212, 214,319 Indonesian Air Force 212 inertial guidance systems 313 inflatable aircraft 262 infrared camera 282 infrared jammer 336 infrared scanner 238-239 inland waterways 82 instant-film camera 330 intelligence. collection of 16, 31-32. 80-81, 142. 146. 153. 162. 170, I 82. 189. 211, 245. 253, 256. 282. 300,303.310. 315. 319. 322. 333. 336, 339 Intelligence and Research. Bureau of 209 intelligence community 2. 20. 33, 81. 138, 153, 160. 164-165. 170-171, 190. 196, 232-233, 254, 298. 303-304, 322. 339 Intelligence Coordination, Office of 81 intelligence requirements 25-26, 80-82, 114, 122, 154, 188-190, 226. 230,233.250, 253,300,332 Intelligence Requirements Officer 81 Intelligence Star 186 Intelligence Systems Panel (ISP) 21-22, 24-26, 30-32. 35, 327 intercept 87. 108, 124, 126-127, 142, 148, 162. 168, 170. 174, 176-177. 259, 285,317.335 interceptor aircraft 93. 109, 124, 148, 176 intercontinental ballistic missile 137. 159 Interior, Department of the 254 international date line 134 International Geophysical Year 85 international law 110 interrogation 2-3. 183, 241 intruder 109 "invisible" dirigible 18 ion cloud 300 ionosphere 175 Iran 124. 133. 189 Iraq 133. 153 Iron Curtain I. 17. 93. 95. Ill. 126. 146 ISINGLASS 312 Isle of Pines 205 Israel 113-114. 116-117, 120, 343 Israeli paratroop 117 Israeli-Egyptian conflict 257. 117 Israeli-Syrian disengagement 257 Itek Corporation 331. 250 IX spaceflights 254 Secaet
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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.