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
Land. Edwin H. (Din) 18, 21, 25, 29-34, 36, 80-81, 89, 96, 100. 110, 19 1-192, 260, 262-263, 269-27 1, 292,307,330, 332-333 Land Panel 37 Langley, Virginia 43, 192, 306, Langley AFB. Virginia 23 Laos 2 I6, 22.1. 231. 233 Las Vegas. Nevada 284 Latham, Allen. Jr. 29 Latvia 303 Laughlin AFB, Texas 198,200 Lebanon 114, 117, 152-153, 343 Ledford, Jack C. 207, 288. 297 Leghorn, Richard S. • - • 4-8. 18, 23. 110, 330 LeMay, Curtis E. 11 -12. 14. 60 "Lemon-Drop l(jd" 124 Lend-Lease 7 Leningrad, Soviet Union 104-106. 109, 142, 298. 303 lens I. 18. 2 1-22, 30. 49-55, 93. I08. 250. 247. 253, 28 1-282. 321, 327 lens curvatures 52 lens designs 52, 55 LeVier. Tony 56, 68-7 1, 75 LF-lA fuel 62 Libya 121 Sec, et NOFOftN Index 37 1 lightweight film 32 LINCOLN 18 Lindsey Air Force Base. Wiesbaden. West Gennany 80 liquid-fueled missiles 161,317 lithium deut,eride 19 Lithuania 303 Little, Arthur D., Inc. 29 Liule Quem1:ly 215 Lloyd, Selwyn 93 Lockheed A:ircraft Corporation 9, 24, 329 Lockheed D:ay Fighter 14 Lockheed m,echanics 66, 13,0, 225 London School of Economics . 15 LONG GREEN 198 long-range bombers 20, 81. 98-99, 316 LONG SHAFT 245 Lop Nor test site 237 Los Ange les., California 186, 254 Lovelace, W. Randolph, III 62, 74 Lovelace Foundation for Medical Education antd Research 74 low-radar-cross-section vehicle 344 low-level phmography 209 low-vapor-pressure fuel 278 Luke AFB. Arizona 74
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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.