It is with a tremendous sense of gratitude and a substantial measure of humility that I acknowledge and thank the people who have contributed to this book. I am indebted to Brent Smith for giving me the opportunity to work with him on the American Terrorism Study. His passion for terrorism research, and his dedication to empirical study, provided the inspiration for this work. None of this would have been possible without the guidance, comments, and support I received from Kelly Damphousse, Mindy Bradley-Engen, and Todd Shields. I am particularly grateful to Kelly Damphousse for the detailed editorial comments he provided, and for his help and collaboration on earlier papers—the resulting publications helped lay the groundwork for the grants that funded this research. I extend a special thanks to Mindy Bradley-Engen for the thoughtful feedback she readily provided, and for always being available to help me work through the methodological components. I am especially grateful to Todd Shields for the help and guidance he provided during this process. Having worked for the Terrorism Research Center in the Fulbright College at the University of Arkansas for nine years, I would be remiss if I neglected to thank the agencies that provided the funding that has made the data collection and analyses possible. The Memorial Institute for the Prevention of Terrorism in Oklahoma City and the National Institute of Justice funded numerous research projects that led to the creation of the American Terrorism Study and the Prosecutorial and Defense Methods Database. Since 2010, the START Center of Excellence at the University of Maryland has been an invaluable partner to the Terrorism Research Center, and allowed our important research to continue. Indeed, their support allowed me to complete this book.