Barton C. Hacker is curator of Military History at the Smithsonian's National Museum of American History. He is a recipient of the Leonardo da Vinci Medal of the Society for the History of Technology and of several writing prizes. He has curated major exhibits on Submarines in the Cold War and West Point in the Making of America. His publications include books on the history of Project Gemini, radiation safety in nuclear weapons testing, and world military institutions, as well as many articles and book reviews on a wide range of topics in the history of military technology. Margaret Vining is Curatorial Specialist in Military History at the Smithsonian's National Museum of American History. She is also Secretary-General of the U.S. Commission on Military History. She has curated or co-curated major exhibits on the G.I. in World War II, Submarines in the Cold War, and West Point in the Making of America, as well as smaller exhibits on the G.I. Bill, the buffalo soldiers in the West, and navy women in World War I. Her publications include a book on West Point plus articles and reviews on military uniforms and women's military history.