Documents / FOIA release
This is a CIA History Staff monograph by Gregory W. Pedlow and Donald E. Welzenbach, written in 1992 and approved for release in 2011. It covers the CIA's manned overhead reconnaissance program from 1954 to 1974 and its two aircraft, the U-2 and the A-12 OXCART. It follows their development, the overflights of the Soviet Union, the downing of Francis Gary Powers in 1960, and later operations. One section is titled "U-2s, UFOs, and Operation BLUE BOOK."
“The Advance”26 pages
U-2 detachment in formation E0129581.11(011>1010<25Yrs IS) Colonel Yancey's group carefully examined all aspects of the U-2 unit from flight crews to camera technicians and mission pro- grammers. When the exercise was over, Yancey reported that the de- tachment was ready for deployment. 1-le then briefed a high-level Pentagon panel that included the Secretary of the Air Force and the Chief of Air Staff. These officials concurred with Yancey's determi- nation that the U-2 was ready for deployment." During these final tests in the spring of 1956, the U-2 once again demonstrated its unique airworthiness. On 14 April 1956, James Cunningham was sitting in his office in Washington when he received informing him that a westward-bound U-2 had ut over the Mississippi River at the western bor- der of Tennessee. After restarting his engine, the pilot reported a sec- ond flameout and engine vibrations so violent that he was unable to get the power plant to start again. Early in the program Bissell and Ritland had foreseen such an emergency and, with the cooperation of the Air Force, had arranged for sealed orders to be delivered to every airbase in the continental United States giving instructions about what to do if a U-2 needed to make an emergency landing. Cunningham had the project office ask the pilot how far he could glide so they could determine which SAC base should be alerted. The pilot, who by this time was over Arkansas, radioed back that, given the prevailing winds and the U-2's 21:1 glide ratio, he thought he could reach Albuquerque. New Mexico. Within minutes Cunningham was on the phone to Colonel Geary in the Pentagon, who then had the Air Force's Assistant Director of Operations, Brig. Gen. Ralph E. " Bissell interview CS); OSA History, chap. 11, pp. 15-16 (TS Codeword). UNCLASSIFIED
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FOIA release, from the cia-readingroom 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.