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
Chapter 5 200 In-flight refueling of a U-2 CO5653421 UNCLASSIFIED NIMBUS. Most of the flights were staged from Laughlin AFB, Texas, but three were flown from Edwards AFB, California, using in-flight refueling to extend the range of the aircraft. By the spring of 1962, having received reports of increased Soviet activity in Cuba, the CIA requested permission for additional photographic coverage of the is- land. The Special Group authorized increasing the number of Cuban overflights to at least two per month, beginning in May 1962. At the same time, the National Photographic Interpretation Center began publishing a Photographic Evaluation of Information on Cuba series.' By early August 1962, CIA analysts had noted a substantial in- crease in Soviet arms deliveries to Cuba during the preceding weeks. The first U-2 overflight in August, mission 3086 on the 5th, flew too soon to detect the Soviet construction program just getting under way at various sites in Cuba. A second mission (3088) was originally set for 8 August, but bad weather forced repeated postponements until 29 August. This mission's photography provided the first hard evidence Ibid.. pp. 19-20 (TS Codeword). Sècset 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.