When the FBI Comes Calling…®
Members of The IC

| World's Major Intelligence Agencies International Intelligence Sharing Constructions |
IC- Intelligence Community
MC- Military Community
Alcohol, Tobacco, and Firearms (ATF)
The primary law enforcement agency responsible for issues relating to Alcohol, Tobacco, and Firearms of all kinds.
Army, Navy, Air Force, and Marine Corps
The Armed Forces of the United States.
Army, Navy, Air Force, and Marine Corps Intelligence
Each collect, synthesize, and disseminate intelligence relevant to their respective Services. These entities range from the Army's localized G-2 to the Navy's SIGINT entity, the Naval Security Group (NSG).
Army Rangers
The primary division of U.S. Special Forces, but perhaps the most notable is the 75th Ranger Regiment in Fort Benning, Georgia which acts as a rapid-response airborne unit always prepared to move anywhere in the world within 18 hours of an order.
Central Intelligence Agency (CIA)
Provides foreign national security intelligence to policy and decision makers. It deals primarily with human intelligence (HUMINT) which revolves around spies, assets, and whistleblowers.
Coast Guard
Coast Guard Intelligence
Collects, synthesizes, and disseminates intelligence relevant to US maritime borders and Homeland Security.
Criminal Division of the IRS (CID)
Customs
Now located within the Department of Homeland Security, the U.S. Customs and Border Protection is responsible for securing the boarders in the United States.
Defense Airborne Reconnaissance Office (DARO)
Acts as the primary oversight and repository for all DoD airborne reconnaissance operations and capabilities.
Defense HUMINT Service (DHS)
Acts as a repository for all DoD initiated human intelligence operations.
Defense Intelligence Agency (DIA)
Provides military intelligence to the White House, Congress, and Department of Defense. Frequently listed as a part of DIA, though actually semi-autonomous to it, is the Central Measurement and Signature Intelligence Organization (CMO)
Delta Force
On constant alert and always prepared to move anywhere in the world within very short periods of time, Delta Force units are some of the most highly trained, lethal fighting forces in the world, known for "black-op," covert operations, infiltration, sabotage, targeted killing, and irregular ("catch-and-snatch") renditions.
Department of Energy (DOE): Office of Intelligence
Gathers intelligence relating to foreign nuclear weapons systems and provides support for ventures in non-proliferation.
Department of Homeland Security (DHS): Information Analysis and Infrastructure Protection Directorate (IA/IP)
Attempts to identify and eliminate threats to homeland security, and assist in recovery should an attack occur.
Department of State (DOS): Bureau of Intelligence and Research
Gathers information dealing with U.S. foreign policy.
Department of Treasury (DOT): Office of Terrorism and Financial Intelligence (TFI)
Deals with intelligence related to international economic, financial, and security affairs, which in turn relate to national fiscal policy.
Drug Enforcement Agency (DEA)
The primary law enforcement entity which works with the FBI and INS.
Inspector Generals (IGs)
Immigration and Natrilization Service (INS)
Intelligence Support Activity (ISA)
Operates under codename "Gray Fox" as it gathers intelligence and executes covert operations abroad for the Department of Defense.
Federal Bureau of Investigation (FBI)
With about 11,500 agents, 65 field offices, and 24 overseas liaison offices, it acts as the primary criminal investigative agency within the United States, and occasionally investigates activities which took place abroad.
Federal Bureau of Investigation (FBI): National Security Division
Has an intelligence branch aimed at collecting and disseminating information relating to transnational crime and international terrorism.
Marshals Service
For over 200 years, the Marshals Service has been responsible for providing law enforcement support for proceedings and activities in three branches of government. Including prisoner transfer, asset forfeiture, and fugitive investigations.
Marine Expeditionary Units (MEUs)
Ship-board regiments (about 2,200 soldiers per regiment), capable of rapid deployment and combat for up to 60 days without resupplying.
National Guard
National Imagery and Mapping Agency (NIMA)
Gathers geo-spatial intelligence to support policy and decision makers in the field of national security.
National Reconnaissance Office (NRO)
A hybrid entity between the defense department (Air Force) and the CIA, which acts as chief coordinator of image intelligence collected by airplane and satellite reconnaissance. It's budged is estimated at around $6 billion dollars (57.7% for technological acquisition, 18% for operations, 9% research and development, 8% launching satellites, and about 7% for infrastructure development).
National Security Agency (NSA)
Acts as the primary collection and processing unit for signals intelligence (SIGINT), through telecommunications intercepts and other electronic surveillance, abroad for policy and decision makers, and protects US security-related information databases, networks, and systems.
Naval Investigative Service (NIS)
The Navy's primary law enforcement, investigative, and counterintelligence agency.
Navy SEALS
Easily deployable and highly trained units which conduct covert operations and mostly low-impact, unconventional warfare.
Navy Special Warfare Development Group
As a division of Navy SEALS, this is a highly tuned special counterrorism unit, focusing more on infiltration, hostage-rescue, targeted killings, and other counterterrorist operations.
Secret Service
With roughly some 3,000 agents and an annual budget of around $850 million, this agency, originally located under the Department of Treasury and now the Department of Homeland Security, hold primary responsibility of both protecting the President, senior government officials, and foreign dignitaries, and acts as the primary agency suppressing counterfeiting around the world. Whenever the President is involved in a highly visible and therefore dangerous event, a "National Special Security Event" (NSSE) is declared, giving the Secret Service the authority as lead agency in charge of security (like the Republican National Convention of 2004).
Special Activities Division (SAD)
As a division of the CIA, SAD incorporates all so-called "fifth function" activities for the agency, such as covert paramilitary operations through its Special Operations Group.
