FBI originated from a force of Special Agents created in 1908 by Attorney General Charles Bonaparte.
It had neither a name nor an officially designated leader other than the Attorney General.
In 1908, the establishment of this kind of agency at a national level was highly controversial.
Attorney General George Wickersham named the force the Bureau of Investigation on March 16, 1909.
First major expansion in Bureau jurisdiction came in June 1910, when the Mann ("White Slave") Act was passed.
Over the next few years, the number of Special Agents grew to more than 300.
World War I : FBI acquired responsibility for the Espionage, Selective Service, and Sabotage Acts.
William J. Flynn, became Director of the Bureau of Investigation in July, 1919.
May 10, 1924: Hoover selected to head the Bureau of Investigation.
1932: First issue of the FBI Law Enforcement Bulletin, called "Fugitives Wanted by Police", was published.
The Bureau of Investigation was renamed the United States Bureau of Investigation on July 1, 1932.
1935: FBI National Academy was established to train police officers in modern investigative methods.
1939 : Presidential Directive FBI's authority to investigate subversives in the United States.
During World War 2, the FBI was responsible for locating draft evaders and deserters.
Congress gave the FBI new federal laws with which to fight civil rights violations, racketeering, and gambling.
By the end of the 1960s, the Bureau employed 6,703 Special Agents and 9,320 Support Personnel in 58 field offices and twelve Legal Attache offices.
FBI Director J. Edgar Hoover died on May 2, 1972.
In 1972, the President appointed the FBI Director with confirmation by the Senate.
President Nixon appointed L. Patrick Gray as Acting Director the day after Hoover's death.
Clarence Kelley's appointed as Director on July 9, 1973.
By the late 1970s nearly 8,000 Special Agents and 11,000 Support Employees worked in 59 Field Offices and 13 Legal Attache offices.
1978: Director Kelley resigned.
Former federal Judge William H. Webster became the new Director.
In 1984, the FBI acted as lead agency for security of the Los Angeles Olympics. In the course of its efforts to anticipate and prepare for acts of terrorism and street crime, it built important bridges of interaction and cooperation with local, state, and other federal agencies, as well as agencies of other countries. It also unveiled the FBI's Hostage Rescue Team as a domestic force capable of responding to complex hostage situations such as tragically occurred in Munich at the 1972 games.
May 26, 1987: Judge Webster left the FBI to become Director of the Central Intelligence Agency.
November 2, 1987: William Steele Sessions was sworn in as FBI Director.
July 19, 1993, following allegations of ethics violations committed by Director Sessions, President Clinton removed him from office.
Deputy Director Floyd I. Clarke became Acting FBI Director.
September 1, 1993: Louis J. Freeh was sworn in as Director of the FBI.
Between 1993 and 2001, the FBI's budget grew by more than $1.27 billion as the Bureau hired 5,029 new Agents and more than 4,000 new Support Personnel.
September 4, 2001: former U.S. Attorney Robert S. Mueller, III was sworn in as FBI Director.
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