Dana Bell is a leading expert on the history of aviation. Now retired after thirty years with the Smithsonian's National Air and Space Museum, he was formerly Technical Information Specialist at the NASM Archives and also worked at the U.S. Air Force Still Photo Depository. He is the author of more than twenty books on aviation subjects, including "At the Controls"; "Smithsonian National Air and Space Museum Directory of Airplanes"; and "One Hundred Years of World Military Aircraft".