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The Central Intelligence Agency (CIA) is an independent agency responsible for providing national security intelligence to senior US policymakers. The Director of the Central Intelligence Agency (D/CIA) is nominated by the president with the advice and consent of the Senate. The Director manages the operations, personnel, and budget of the Central Intelligence Agency. The CIA is separated into four basic components: the National Clandestine Service, the Directorate of Intelligence, the Directorate of Science & Technology, and the Directorate of Support. They carry out "the intelligence cycle," the process of collecting, analyzing, and disseminating intelligence information to top US government officials. In addition, the D/CIA has several staffs that deal with public affairs, human resources, mission innovation, protocol, congressional affairs, legal issues, information management, and internal oversight.

The Defense Intelligence Agency (DIA) is a Department of Defense combat support agency and an important member of the United States Intelligence Community. With over 12,000 military and civilian employees worldwide, DIA is a major producer and manager of foreign military intelligence and provides military intelligence to warfighters, defense policymakers and force planners, in the Department of Defense and the Intelligence Community, in support of US military planning and operations and weapon systems acquisition. The Director of DIA is a three-star military officer who serves as principal adviser to the Secretary of Defense and to the Chairman of the Joint Chiefs of Staff on matters of military intelligence. The Director also chairs the Military Intelligence Board, which coordinates activities of the defense intelligence community. DIA is headquartered at the Pentagon in Washington, DC, with major operational activities at the Defense Intelligence Analysis Center (DIAC), Washington, DC, the Armed Forces Medical Intelligence Center (AFMIC), Frederick, MD, and the Missile and Space Intelligence Center (MSIC), Huntsville, AL.

The Office of Intelligence and Counterintelligence provides the Secretary, his staff and other policymakers within the Department timely, technical intelligence analyses on all aspects of foreign nuclear weapons, nuclear materials and energy issues worldwide.

The Office of Intelligence and Analysis is responsible for using information and intelligence from multiple sources to identify and assess current and future threats to the United States. DHS Intelligence focuses on five principal areas: improving the quality and quantity of its analysis; integrating the intelligence elements of the Department; sharing threat information and assessments with state and local governments and the private sector; ensuring DHS is an effective member of the national Intelligence Community; and strengthening relations with Congress.

Members of the IC Part 1 | Part 2 | Part 3