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
52 Settet N0FORl)I Chapter 2 A-2 camera U-2s equipped with the A- I camera system also carried a Perkin-Elmer tracking camera using 2.75-inch film and a 3-inch lens. This device made continuous horizon-to-horizon photographs of the terrain passing beneath the aircraft. Because the A - I system was: new, it also included a backup camera system. a K-17 6-inch three-camera trimetrogon unit using 9-inch film. Whi le the A -1 system was still being developed, James )Baker was already working on the next generation of lenses for high-alrtitude reconnaissance. Baker was a pioneer in using computers to synthesi ze optical systems. His software algorithms made it possible to model lens designs and determine in advance the effects that variatio,ns in lens curvatures. glass compounds. and lens spacings would have on rays of light passing through a lens. These .. ray-tracing" programs re quired extensive computations, and, for this he turned to the most modem computer available, an IBM CPC (card-programmed callcula tor) installation at nearby Boston University. 17 " Ibid.. chap. I. pp. 7-8 (TS Codeword). -Seeret
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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.