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James R. Hansen is a professor emeritus of history at Auburn University. A former historian for NASA, Hansen is the author of 12 books on the history of aerospace and a two-time nominee for the Pulitzer Prize in history. His 1995 book "Spaceflight Revolution" was nominated for the Pulitzer by the National Aeronautics and Space Administration, the only time NASA ever nominated a book for the prize. Author of the New York Times best-selling book, "First Man: The Life of Neil Armstrong," Hansen is also co-producer of the film, starring Ryan Gosling, which is based on his biography.