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.
“Cooper”12 pages
228 Chapter 5 Lan-chou, PRC, 23 February 1962 for air order of battle. In addition to the primary targets already de scribed, the initial series of Project TACKLE missions obtained pho tography of the submarine construction facilities at Shanghai and Wu-ch'ang, which showed a low levd of activity. Other photographs revealed tremendous expansion of the industrial complexes at Nanking and Ch'ang-sha and the pre:sence of a previously unknown industrial area at Chiang-yu.•0 Encouraged by the success of the first TACKLE missions, COMOR recommended in May 1962 that Detachment H cover as many as possible of the highest priority industrial and airfield targets in northeast China and the missile! test ranges in north China. COMOR noted that, with the exception of the areas around Peiping and the Shuangchengzi missile test range, the chances of a U-2 being downed were low. The USIB concurred with COMOR's recommen dations, and Detachment H therefore conducted three more over flights of the PRC during the month of June:' ~• OSr\ History. chap. 17. p. -l5 (TS Codeword;,: Mission folders GRCI02 (23 February 1962). GRCIO-l ( 13 March 1962). and GRCI06 (26 March 1962). OSA records. j ob 67-8-972. box 19 (TS Codeword). " Lay, "USIB History." vol. 2. pp. 385-386 (T:S Codeword).
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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.