Leo Marks Shares His Experiences as a Codemaker in World War II.
Leo Marks served as one of Britain's top code makers during WWII. There he revolutionized the military's code making methods. He's written about his experiences in "Between Silk and Cyanide: A Codemaker's War 1941-1945. (Free Press) Marks is also a screenwriter. His most famous film is the 1960's cult-classic "Peeping Tom."
Other segments from the episode on July 13, 1999
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