On a Friday in 1948, six aeronautical designers from the Boeing Company holed up in a hotel suite in Dayton, Ohio. They stayed put until Monday morning, except for the one who left to visit a hobby shop and returned with balsa wood, glue, carving tools and silver paint. The group emerged with a neatly bound 33-page proposal and an impressive 14-inch scale model of an airplane on a stand. Col. Pete Warden, the Air Force chief of bomber development, studied the result and pronounced, “This is the B-52.”