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1. U-2S, UFOS, AND OPERATION BLUE BOOK

   in the entire U-2 program.48 U-2s, UFOs, AND OPERATION BLUE BOOK High-altitude testing of the U-2 soon led ... to an unexpected side effect-a tremendous increase in reports of unidentified flying objects (UFOs ... of UFO reports. Such reports were most prevalent in the early evening hours from pilots of airliners ...