Security agency in the context of "FBI"

The Federal Bureau of Investigation (FBI) is the primary federal law enforcement agency in the United States and also the American domestic intelligence and security service. An agency of the United States Department of Justice, the FBI is a member of the U.S. Intelligence Community and reports to both the attorney general and the director of national intelligence. A leading American counterterrorism, counterintelligence, and criminal investigative organization, the FBI has jurisdiction over violations of more than 200 categories of federal crimes. The FBI maintains a list of its top 10 most wanted fugitives.

Although many of the FBI's functions are unique, its activities in support of national security are comparable to those of the British MI5 and NCA and the Russian FSB. Unlike the Central Intelligence Agency (CIA), which has no law enforcement authority and is focused on intelligence collection abroad, the FBI is primarily a domestic agency, maintaining 56 field offices in major cities throughout the United States, and more than 400 resident agencies in smaller cities and areas across the nation. At an FBI field office, a senior-level FBI officer concurrently serves as the representative of the director of national intelligence.

Secret police (or political police) are police, intelligence or security agencies that engage in covert operations against a government's political, ideological or social opponents and dissidents. Secret police organizations are characteristic of authoritarian and totalitarian regimes. They protect the political power of a dictator or regime and often operate outside the law to repress dissidents and weaken political opposition, frequently using violence. They may enjoy legal sanction to hold and charge suspects without ever identifying their organization.

The People's Commissariat for Internal Affairs (Russian: Народный комиссариат внутренних дел, romanized: Narodnyy komissariat vnutrennikh del, IPA: [nɐˈrodnɨj kəmʲɪsərʲɪˈat ˈvnutrʲɪnʲɪɣ dʲel]), abbreviated as NKVD (Russian: НКВД; listen), was the interior ministry and secret police of the Soviet Union from 1934 to 1946. The agency was formed to succeed the Joint State Political Directorate (OGPU) secret police organization, and thus had a monopoly on intelligence and state security functions. The NKVD is known for carrying out political repression and the Great Purge under Joseph Stalin, as well as counterintelligence and other operations on the Eastern Front of World War II. The head of the NKVD was Genrikh Yagoda from 1934 to 1936, Nikolai Yezhov from 1936 to 1938, Lavrentiy Beria from 1938 to 1946, and Sergei Kruglov in 1946.

First established in 1917 as the NKVD of the Russian SFSR, the ministry was tasked with regular police work and overseeing the country's prisons and labor camps. It was disbanded in 1930, and its functions dispersed among other agencies before being reinstated as a commissariat of the Soviet Union in 1934. During the Great Purge in 1936–1938, on Stalin's orders, the NKVD conducted mass arrests, imprisonment, torture, and executions of hundreds of thousands of Soviet citizens. The agency sent millions to the Gulag system of forced labor camps and, during World War II, carried out the mass deportations of hundreds of thousands of Poles, Balts, and Romanians, and millions of ethnic minorities from the Caucasus, to remote areas of the country, resulting in millions of deaths. Hundreds of thousands of NKVD personnel served in Internal Troops divisions in defensive battles alongside the Red Army, as well as in "blocking formations," preventing retreat. The agency was responsible for foreign assassinations, including that of Leon Trotsky.

A lieutenant is a junior commissioned officer rank in the armed forces of many nations, as well as fire services, emergency medical services, security services and police forces.

The rank in armies and air forces is often subdivided into subcategories of seniority. In English-speaking navies, lieutenants are often equivalent to the army rank of captain; in other navies, the lieutenants are usually equal to their army counterparts.

The Ministry of State Security (MSS) is the principal civilian intelligence and security service of the People's Republic of China, responsible for foreign intelligence, counterintelligence, and political security of the Chinese Communist Party (CCP). One of the largest and most secretive intelligence organizations in the world, it maintains powerful semi-autonomous branches at the provincial, city, municipality and township levels throughout China. The ministry's headquarters, Yidongyuan, is a large compound in Beijing's Haidian district.

The origins of the MSS date to the beginnings of the CCP's Central Special Branch, replaced by the Central Committee Society Department from 1936 through the proclamation of the People's Republic in 1949. In 1955, the department was replaced with the Central Committee Investigation Department, which existed in various configurations through the Cultural Revolution to 1983, when it was merged with counterintelligence elements of the Ministry of Public Security (MPS) to form the MSS.

The Security Service, commonly known as MI5 (Military Intelligence, Section 5), is the United Kingdom's domestic counter-intelligence and security agency and is part of its intelligence machinery alongside the Secret Intelligence Service (MI6), Government Communications Headquarters (GCHQ), and Defence Intelligence (DI). MI5 is directed by the Joint Intelligence Committee (JIC), and the service is bound by the Security Service Act 1989. The service is directed to protect British parliamentary democracy and economic interests and to counter terrorism and espionage within the United Kingdom. Within the civil service community, the service is colloquially known as Box, or Box 500, after its official wartime address of PO Box 500; its current address is PO Box 3255, London SW1P 1AE.

The Security Service is derived from the Secret Service Bureau, founded in 1909. At the start of the First World War, it was responsible for the arrest of enemy spies, or suspected enemy spies. Throughout the First World War, Germany continually attempted to infiltrate Britain, but MI5 was able to identify most, if not all, of the agents dispatched. During the Second World War, it developed the Double-Cross System. This involved attempting to "turn" captured agents wherever possible, and use them to mislead enemy intelligence agencies.

The Federal Security Service of the Russian Federation (FSB) is the principal security agency of Russia and the main successor agency to the Soviet Union's KGB; its immediate predecessor was the Federal Counterintelligence Service (FSK), which was reorganized into the FSB in 1995. The three major structural successor components of the former KGB that remain administratively independent of the FSB are the Foreign Intelligence Service (SVR), the Federal Protective Service (FSO), and the Main Directorate of Special Programs of the President of the Russian Federation (GUSP).

The primary responsibilities are within the country and include counter-intelligence, internal and border security, counterterrorism, surveillance and investigating some other types of serious crimes and federal law violations. It is headquartered in Lubyanka Square, Moscow's center, in the main building of the former KGB. The director of the FSB is appointed by and directly answerable to the president of Russia. Being part of Russia's executive branch formally, the FSB has significant, if not decisive, power over it.

Government Communications Headquarters (GCHQ) is an intelligence and security organisation responsible for providing signals intelligence (SIGINT) and information assurance (IA) to the government and armed forces of the United Kingdom. Primarily based at The Doughnut in the suburbs of Cheltenham, GCHQ is the responsibility of the country's Secretary of State for Foreign and Commonwealth Affairs (Foreign Secretary), but it is not a part of the Foreign Office and its director ranks as a Permanent Secretary.

GCHQ was originally established after the First World War as the Government Code and Cypher School (GC&CS) and was known under that name until 1946. During the Second World War it was located at Bletchley Park, where it was responsible for breaking the German Enigma codes. There are two main components of GCHQ, the Composite Signals Organisation (CSO), which is responsible for gathering information, and the National Cyber Security Centre (NCSC), which is responsible for securing the UK's own communications. The Joint Technical Language Service (JTLS) is a small department and cross-government resource responsible for mainly technical language support and translation and interpreting services across government departments. It is co-located with GCHQ for administrative purposes.