Lockheed SR-71 Blackbird

The Lockheed Skunk Works built the Blackbird to cruise at Mach 3.2 above 60,000 feet so as to be untouchable when flying reconnaissance missions over hostile nations like the Soviet Union and Cuba. It was originally called the RS-71 but when President Lyndon Johnson publicly announced it he transposed the letters and called it the SR-71. So the Air Force changed its designation and the thousands of technical manuals and other support materials so that the whole world would not know that our president was a bonehead.