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."
“Burbank”8 pages
Chapter 3 133 CO5653421 UNCLASSIFIED boom, which could lift entire airframes 50 feet in the air, technicians could change the airframe's attitude and run radar tests almost contin- uously without having to fuel and fly the plane' By the summer of 1957, testing of the radar-deception system was complete, and in July the first "dirty bird" (DB) arrived at Detachment B. The first operational use of this aircraft occurred on 21 July 1957 in mission 4030 oven i lOn 31 July, the same aircraft made a run over the Black Sea. 'I here were a total of nine DB missions over the USSR. The antiradar system did not prove very effective, and its use was curtailed in May 1958.7" ED 129581.13(dlill>10101010<25Yrs (Si 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.