R. William Johnstone served on the staff of the National Commission on Terrorist Attacks Upon the United States (9/11 Commission) after working for over 20 years as a Congressional staff member. He is the author of 9/11 and the Future of Transportation Security (2006), Bioterror: Anthrax, Influenza, and the Future of Public Health Security (2008, paperback edition to be published in 2015), and the homeland security section of the annual A Unified Security Budget for the United States (2007-2012). He is the co-author of the monograph "Four Flights and Civil Aviation Security, staff report of the National Commission on Terrorist Attacks Upon the United States (2004), and a contributor to The 9/11 Commission Report: Final Report of the National Commission on Terrorist Attacks Upon the United States (2004). In his time as a Congressional staff member, Johnstone served as legislative director for U.S. Senators Wyche Fowler, Jr. (D-GA) and Max Cleland (D-GA). Mr. Johnstone grew up in Atlanta, GA and attended Emory University. He currently lives in Rockville, MD with his wife and son, and is a consultant and writer on homeland security matters.