What's the difference between the FBI, the CIA, the police and the Coast Guard?

Central Intelligence Agency (C.I.A) (Sydney, alias double-faced female spy, is a CIA agent).

1947, in order to prevent the Pearl Harbor tragedy from happening again, President Truman decided to set up a special non-military intelligence agency on the basis of the Office of Strategic Services. In the same year, after President Truman signed the National Security Law, the Central Intelligence Agency (CIA) was born. The original intention of the CIA was to deal with the increasingly complex "intelligence war" from the former Soviet Union and Eastern European countries. Therefore, the scope of responsibility of the CIA at the beginning of its establishment was much smaller than today, and it was very complicated. At that time, the CIA was responsible for intelligence gathering outside the United States, anti-espionage work in the United States, and secret training for global anti-* * forces. Moreover, it is very important that the CIA was funded by the Department of Defense at that time, rather than being affected by the funding of the Senate and House Appropriations Committees as an independent institution. So at that time, many secret actions of the CIA were unknown, and they were not questioned and listened to by the armed forces committees of the Senate and the House of Representatives.

The United States Coast Guard is a special unit that carries out tasks such as saving lives, protecting state property, enforcing laws, conducting scientific investigations and safeguarding national security. Usually, the Coast Guard performs humanitarian tasks for the Ministry of Communications. In wartime, the coast guard was a highly specialized part of the navy. The task of the guard is to make the young male and female students who graduate have healthy bodies, strong will and clear heads, love marine and naval scientific knowledge, have a high sense of honor, be loyal and honest, obey orders, have enterprising spirit and leadership skills, have a solid foundation in navigation and scientific knowledge, and behave in a civilized and polite manner. They will never tarnish the glorious tradition of serving the United States and mankind by active officers of the US Coast Guard. Guards have three educational principles. One is to set an example, issue instructions, and create an environment where everyone is highly respected, loyal and honest, and obeys orders. The second is to provide a solid university education according to the needs of the coast guard; Third, the implementation of leadership training, so that students can immediately assume the duties of junior officers on board after graduation.

The US Coast Guard is the originator of the Coast Guard all over the world, the only comprehensive law enforcement agency in the United States, and one of the most powerful maritime law enforcement teams in the world today. The US Coast Guard is one of the five largest armed forces in the United States, and it is also a department of the Department of Homeland Security, the largest department of the US federal government. As the originator of the World Coast Guard, the United States Coast Guard is a model for the construction of maritime law enforcement teams in many countries. The U.S. Coast Guard is the only one of the five armed forces in the United States that has law enforcement power, and it is also the only one that is not controlled by the Department of Defense. The history of the Coast Guard is very complicated. It was formed by the gradual merger of five different federal agencies, and the competent departments have been changed several times.

Federal Bureau of Investigation (F.B.I.) (X Fox Mott and sculli in the X file are FBI agents).

F.B.I is the most powerful federal law enforcement and investigation department in the United States in the 20th century. No other law enforcement agency is as powerful as the United States. From the late 1950s to the mid-1960s, the United States Federal Bureau of Investigation (FBI) continued to expand its scale, and its law enforcement and investigation authority also expanded. Even the director of the FBI seems to report the national security situation to the president every day, instead of the president's national security assistant. Of course, this also has certain historical background factors. At that time, the former Soviet Union was in full swing, the cold war between the East and the West was grim, the national security of the United States was greatly threatened, the activities of foreign intelligence forces in the United States were increasingly rampant, and the former Soviet Union actively developed anti-American forces in various turbulent regions of the world. Therefore, in such a specific historical environment, F.B.I has achieved unprecedented development, and is fully responsible for maintaining national security and preventing organized terrorist activities internally; Externally, actively assist the U.S. Military Intelligence Agency (M.I.A, the U.S. Department of Defense) and the Central Intelligence Agency (C.I.A, the Central Intelligence Agency) in preventing and cracking down on all intelligence and military activities that may endanger U.S. national security (terrorism was not so rampant at that time).

The United States is a federal country, and the police system of each federal member (state) is independent, that is to say, the police of each state cannot cross regions according to their own situation and rights, but if they deal with a wider range of crimes, they need greater authority, so there is the Federal Bureau of Investigation to enforce the law throughout the federal scope. Of course, the so-called safeguarding national security is only part of its functions within the Federation. In addition, the American judicial system cannot be simply applied to China. National security is a part of the public security system. Don't confuse concepts, it's just a matter of the nature of work, and it's even more impossible to exchange concepts directly with the FBI and the police.