Introduces the operational and organizational dynamics of terrorism and other threats facing the United States today. Considers those who act as individuals, in small groups, or in large organizations and indigenous actors, as well as those who come to the United States to raise money, recruit, or commit their acts of violence. Focuses on violent clandestine activity that, whatever its motivation, has a political purpose or effect. Addresses specific topics such as suicide terrorism, the role of the media, innovation and technology acquisition, and ways of measuring the effect of counterterrorism policies and strategies.