Perhaps no other aircraft in aviation history has been such a well-kept secret as the Lockheed SR-71 Blackbird. This cutting edge aircraft took the art of aerial spying to an unprecedented level and did it all, from highly clandestine high-speed spy missions over Communist nations during the late 1960s and 1970s for the U.S. Air Force and CIA to advanced sonic boom and hypersonic flight research studies for NASA. This book tells the fascinating story...