Matthew M. Aid is the author of Intel Wars: The Secret History of the Fight Against Terror (January 2012) and The Secret Sentry, the definitive history of the National Security Agency. He is a leading intelligence historian and expert on the NSA, and a regular commentator on intelligence matters for the New York Times, the Financial Times, the National Journal, the Associated Press, CBS News, National Public Radio (NPR), and many others. He lives in Washington, DC.