An overview of terrorism in the modern era, ranging from how to define terrorism, the history and evolution of modern terrorism, significant terrorist groups, motivations and ideologies, root causes, radicalization and recruitment, organizational patterns, leadership types, modus operandi, funding, targeting patterns and significant areas of operations, ranging from "physical" to cyberspace. International and domestic terrorism will be discussed. An overview of counterterrorism and core concepts, such as the components of anti-terrorism and counter-terrorism, measures of effectiveness, the role of strategic surprise in terrorist and counterterrorist operations. (3)