This course will provide the student, through lecture and key readings, with a comprehensive understanding of the one hundred year history of the development of the FBI counterintelligence role. With cases and events serving as compass points the students will examine the major personalities, laws, policies, issues, attitudes and events that accelerated and retarded the growth of a robust FBI counterintelligence structure. Students will also learn the importance of the rule of law in the counterintelligence function and the role that espionage and counterintelligence cases have played over the past three decades in the formation of the new field of "National Security Law."