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.
“Sea”42 pages
Seeret NOFO"N Chapter 5 226 1961 PFIAB recommended the initiation of a limited number of U-2 photographic missions over the Chinese mainland. The President ap proved the board's recommendation. Because the US-Nationalist Chinese overflight program (Project TACKLE) was a joint effort, both countries participated in the ap proval process and also shared in the results of the missions. The USlB COMOR established the requirements for Detachment H's overflights, which had to be approved by the NSC's Special Group (5412 Committee) and the President. The Nationalist Chinese Government also approved all missions flown by its pilots. Under the terms of an agreement reached with the Nationalist Chinese Government, film from the overflights of the mainland would be pro cessed in the United States, with a duplicate positive copy returned to Nationalist China within IO days. NPIC was responsible for the initial reporting on these missions.'" Project TACKLE overflights began early in 1962. Following a 5 January Special Group decision to approve three missions, a Detachment H U-2 with a Nationalist Chinese pilot flew its first mis sion over the PRC's missile-testing range at Shuangchengzi on 12 January 1962. Unfortunately, because of faulty navigation or faulty maps, the aircraft was poorly positioned and obtained only oblique, rather than vertical, photography of the range. En route to and from Shuangchengzi, the U-2 overflew Fukien and Chekiang Provinces looking for suspected deployed missiles, but none could be found in the mission photography.39 The second Project TACKLE mission took place on 23 February 1962, when a U-2 overflew the PRC's nuclear weapons establishment at Lan-chou. Photography from this mission revealed that the installa tion was at least two years away from operational capacity. Two more missions on 13 and 26 March flew over K'un-ming and central China covering numerous airfields that had been discovered in satellite pho tography. The U-2 photographs showed more detail than the satellite pictures, thereby, providing additional intelligence data, particularly " OSA History, chap. 17, pp. 18-19, annex 107 (TS Codeword). ,., Ibid., chap. 17, p. 45 (TS Codeword); Mission folder GRC I 00 ( 12 January 1962), OSA records.job 67-B-972, box 19 (TS Codeword). Note: The numbers for missions flown by Nationalist Chinese pilots began with GRC (Government of the Republic of China). ~ecret
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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.