Roger E BilsteinRoger E. Bilstein is a professor emeritus of history at the University of Houston, Clear Lake. He is the author of Flight Patterns: Trends of Aeronautical Development in the United States, 1918-1929; Stages to Saturn: A Technologica History of the Apollo/Saturn Launch Vehicles; and Flight in America: From the Wrights to the Astronauts, the last available from Johns Hopkins. Read More Read Less