Richard A. Clarke served as a key advisor on intelligence and counterterrorism in the administrations of Presidents Ronald Reagan, George H. W. Bush, and Bill Clinton. In 1998 President Clinton appointed him as the National Coordinator for Security, Infrastructure Protection, and Counterterrorism for the U.S. National Security Council. Since leaving the public sector in 2003, Mr. Clarke has taught at the John F. Kennedy School of Government at Harvard University and consulted for ABC News on political and security issues. He now chairs the Board of Governors of the Middle East Institute. He is the author of seven books, both fiction and nonfiction, including the #1 New York Times bestseller Against All Enemies: Inside America’s War on Terror.