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
51 Secret NOFORN Chapter 2 his research associate duties at Harvard and his service on go,vem ment advisory bodies, Baker established a small firm known as Spica, Incorporated, on 31 January 1955. The A-1 camera system consisted of two 24-inch K-38 framing cameras. One was mounted vertically and photographed a 17.2° swath beneath the aircraft onto a roll of 9.5- inch fi lm. The second K-38 was placed in a rocking mount so that it alternately photographed the left oblique and right oblique out to 36.5° onto separate rolls of 9.5-inch fi lm. The film supplies unwound in opposite directions in ordler to minimize their effect on the balance of the aircraft. Both cameras used standard Air Force 24-inch focal-length lenses adjusted for max imum acuity by Baker. The development of the special rocking mount by Perkin-Elmer's Dr. Roderic M. Scott was a major factor in neduc ing the size and weight of the A- I system, because the mount pro vided broad transverse coverage with a single lens, ending the need for two separate cameras. 16 •• OSA History. chap. I. annt!x 3, pp. 1-3 (TS Co1kword). A-1 camera SeGF&t
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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.