Dr. John Mark Mattox is an Associate Professor at the National War College, National Defense University, Washington, D.C. For 11 years prior to coming to National War College, he was a Senior Research Fellow at National Defense University’s Institute for National Security Studies, where he directed the Department of Defense’s Countering Weapons of Mass Destruction Graduate Fellowship Program. Dr. Mattox was also the inaugural General Hugh Shelton Chair in Ethics at the U.S. Army Command and General Staff College. A retired U.S. Army Colonel, Dr. Mattox is the former Dean of the Defense Threat Reduction University and Commandant of the Defense Nuclear Weapons School. He served on three continents as a field artillery officer and is a veteran of the First Gulf War. He holds degrees from Brigham Young University, the U.S. Army Command and General Staff College, the U.S. Army War College, and a Ph.D. from Indiana University in philosophy and semiotic studies. He has served on the faculty of the United States Military Academy at West Point, the University of Maryland, and Missouri State University.