1, FBI
The Federal Bureau of Investigation (FBI) is one of the most important intelligence agencies in the United States. It enjoys a high reputation in the world and belongs to the US Department of Justice. "FBI" is not only the abbreviation of the FBI, but also represents the creed it adheres to-loyalty, courage and integrity, and symbolizes the federal police.
The task of the FBI is to investigate anti-federal criminals, support the law, protect the United States, investigate intelligence and terrorist activities from foreign countries, and enforce them in leadership and law. Provide assistance to federal, state, local and international institutions, perform their duties, respond to public needs, and be loyal to the US Constitution. Five aspects that affect society enjoy the highest priority: anti-atrocities, drugs/organized crime, foreign anti-espionage activities, violent crimes and white-collar crimes.
2. Negative security assurances
The National Security Agency (NSA) is the largest intelligence department in American government agencies, which is responsible for collecting and analyzing foreign and domestic communication materials. It belongs to the U.S. Department of Defense, also known as the National Secret Service. 1952, according to a secret instruction from President Truman, it was separated from the military department at that time and used to strengthen intelligence and communication work. It is the center of American intelligence agencies.
3. CIA
The Central Intelligence Agency (CIA) is headquartered in Langley, Virginia, USA. Together with the Soviet National Security Council (KGB), British MI 6 and Israel Mossad, it is called "the four major intelligence agencies in the world".
Its main task is to openly and secretly collect and analyze information about foreign governments, companies, terrorist organizations, individuals, politics, culture, science and technology, coordinate the activities of other domestic intelligence agencies, and report this information to the work of various departments of the US government.
He is also responsible for maintaining a large number of military equipment, which was used to overthrow foreign governments during the Cold War, such as the Soviet Union, Abens of Guatemala, Allende of Chile and other opponents who threatened the interests of the United States. The headquarters of the Central Intelligence Agency is located in Langley, Virginia.