Using the best scientific decision-making practices, this book introduces the concept of risk management and its application in the structure of national security decisions. It examines the acquisition and utilization of all-source intelligence and addresses reaction and prevention strategies applicable to chemical, biological, and nuclear weapons; agricultural terrorism; cyberterrorism; and other potential threats to our critical infrastructure. It discusses legal issues and illustrates the dispassionate analysis of our intelligence, law enforcement, and military operations and actions. The book also considers the redirection of our national research and laboratory system to investigate weapons we have yet to confront.