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."
“Hill”13 pages
MC-2 partial-pressure suit (seen on pilot Francis Gary Powers) CO5653421 UNCLASSIFIED """"Igeret-ALQ Chapter 2 63 advanced gear for the U-2 pilots. David Clark expert Joseph Ruseckas then developed a complex life-support system, which was the first partially pressurized "spacesuit" for keeping humans alive for lengthy periods at ultrahigh altitudes. The effort to provide a safe en- vironment for pilots at high altitudes also involved the Firewel Company of Buffalo, New York, which pressurized the U-2 cockpit to create an interior environment equivalent to the air pressure at an alti- tude of 28,000 feet. The system was designed so that, if the interior cockpit pressure fell below the 28,000-feet level, the pilot's suit would automatically inflate. In either case, he could obtain oxygen only through his helmet.'4 " Ibid., chap. 5, p. 19 (TS Codeword). UNCLASSIFIED
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FOIA release, from the cia-readingroom 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.