1930: David Kahn, noted cryptologic historian was born.
Dr. Kahn's unique collection in the NCM and Museum Library includes more than 2,800 books and over 130,000 pages of notes from interviews with hundreds of cryptologic and intelligence personnel, foreign and American, many now deceased, obtained in the course of research for his many books, such as "The Codebreakers." The collection houses photocopies of rare or unique intelligence documents from foreign and domestic archives and from private collections. Thanks to Dr. Kahn, the museum possesses 55 extremely rare books, such as a copy of the first printed book on cryptology, Johannes Trithemius's "Polygraphiae" of 1518. The one-of-a-kind items in the Dr. David Kahn Collection include a telescript of his appearance on the Tonight Show (now on display as part of the NCM's and a typescript of Herbert Yardley's once controversial American Black Chamber.