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.
“The Advance”34 pages
185 The Prettyman Board's finding was based on a large body of evi dence indicating that Powers was telling the truth about the events of I May 1960: the testimony of the experts who had debriefed Powers after his return; a thorough investigation of Powers' background with testimony by doctors, psychiatrists, former Air Force colleagues, and his commander at Adana; Powers' own testimony before the board; the results of a polygraph examination that he had volunteered to un dergo; and the evidence provided by photographs of the wreckage of his aircraft, which Kelly Johnson had analyzed and found consistent with Powers' story. Nevertheless, DCI McCone remained skeptical. He asked the Air Force to convene its own panel of experts to check Johnson's assessment of the photographs of the U-2. The Air Force quickly complied, and the panel supported Johnson's findings. McCone then seized upon the one piece of evidence that contradicted Powers' testimony-a report by the National Security Agency (NSA) that suggested that Powers may have descended to a lower altitude and turned back in a broad curve toward Sverdlovsk before being downed-and ordered the Prettyman Board to reconvene on I March for another look at this evidence. The board remained unconvinced by NSA's thin evidence and stuck to its original findings. A few days lat er, on 6 March 1962, Powers appeared before the Senate Armed Services Committee, which commended his actions. The Senate Foreign Relations Committee also held brief hearings on the U-2 Affair, with DCI McCone representing the CIA.-'-' Although all of these inquiries found Powers to have acted prop erly, they did not release many of their favorable findings to the pub lic, which had received a very negative image of Powers' behavior from sensational press reports and statements by public figures who were not aware of (or chose to ignore) the truth about Powers· actions while in captivity. One member of the Senate Foreign Relations Committee, Senator John J. Williams, expressed concern about the impact of this silence on Powers' reputation in a question to DCI McCone on 6 March 1962: "Don't you think he is being left with just a little bit of a cloud hanging over him? If he did everything he is supposed to do, why leave it hanging?" ,s Doubts about Powers did remain in the public mind because he received no public recognition for his efforts to withhold information from the Soviets. He was also "' Beschloss. Mayday. p. 352-35-k Thomas Powers. Man Wlzo Kept the Secrets. p. 328; Prettyman Board. DCI records (S). " United States Congress. Senate. Foreign Relations Committee. £recutive Sessions of tlze Sencae Foreign Relations Committee (Historical Series). vol. 12. 86th Congre.~s. Second Session... Report on the U-2 Incident." 6 March 1962. p. 265 (declassified 1982). Secret NOfiotUd Chapter 4 Seccet
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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.