BRENDA J. LUTZ is a Research Associate at the Decision Sciences and Theory Institute, Indiana University-Purdue University at Fort Wayne, USA.JAMES M. LUTZ is Professor and Chair of the Department of Political Science at Indiana University-Purdue University at Fort Wayne, USA. They have previously co-authored a textbook, Global Terrorism (2004) and Terrorism: Origins and Evolution (2005). They have also co-authored ten articles and chapters that deal with terrorism and political violence.