Federal Bureau of Investigation

J. Edgar Hoover, FBI director from 1924 to 1972
The "suicide letter", mailed anonymously to King by the FBI
An FBI surveillance photograph of Joseph D. Pistone (aka Donnie Brasco), Benjamin "Lefty" Ruggiero and Edgar Robb (aka Tony Rossi), 1980s
FBI SWAT agents in a training exercise
An FBI agent tags the cockpit voice recorder from EgyptAir Flight 990 on the deck of the USS Grapple (ARS 53) at the crash site on November 13, 1999.
September 11 attacks at the Pentagon
FBI field divisions map
Organization chart for the FBI as of July 15, 2014
An FBI agent at a crime scene
FBI badge and service pistol, a Glock Model 22, .40 S&W caliber
FBI Director James Comey visiting the Fort Berthold Indian Reservation in North Dakota in June 2016.
The J. Edgar Hoover Building, FBI Headquarters
FBI Mobile Command Center, Washington Field Office
The FBI Academy, located in Quantico, Virginia
The FBI Field Office in Chelsea, Massachusetts
An FBI Evidence Response Team
Agents in training on the FBI Academy firing range
A Glock 22 pistol in .40 S&W caliber
Publication following the 2021 United States Capitol attack
The popular TV series The X-Files depicts the fictional FBI Special Agents Dana Scully (Gillian Anderson) and Fox Mulder (David Duchovny) who investigate paranormal phenomena.

Domestic intelligence and security service of the United States and its principal federal law enforcement agency.

- Federal Bureau of Investigation

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Hall's ID badge photo from Los Alamos

Theodore Hall

American physicist and an atomic spy for the Soviet Union, who, during his work on US efforts to develop the first and second atomic bombs during World War II (the Manhattan Project), gave a detailed description of the "Fat Man" plutonium bomb, and of several processes for purifying plutonium, to Soviet intelligence.

American physicist and an atomic spy for the Soviet Union, who, during his work on US efforts to develop the first and second atomic bombs during World War II (the Manhattan Project), gave a detailed description of the "Fat Man" plutonium bomb, and of several processes for purifying plutonium, to Soviet intelligence.

Hall's ID badge photo from Los Alamos
Modern-day Los Alamos aerial view
Basic design of an implosion-type atomic bomb
Report on recruiting of Theodore Hall from the Venona project

Hall was questioned by the Federal Bureau of Investigation in March 1951 but was not charged.

Patch of the Hostage Rescue Team

Hostage Rescue Team

Patch of the Hostage Rescue Team
FBI HRT agents in June 2006.
Hostage Rescue Team agents
HRT operators in training
FBI HRT operators prepare to storm a room during CQC exercises.
HRT operators participate in an urban assault training exercise
HRT operators review actions following an urban assault training exercise

The Hostage Rescue Team (HRT) is the elite tactical unit of the Federal Bureau of Investigation (FBI).

U.S. Customs and Border Protection

Largest federal law enforcement agency of the United States Department of Homeland Security, and is the country's primary border control organization.

Largest federal law enforcement agency of the United States Department of Homeland Security, and is the country's primary border control organization.

Scanning a delegate bus entering the 2016 Democratic National Convention
U.S. Customs and Border Protection Officers (CBPO) armed with UMPs
CBP – Office of Field Operations Shoulder Patch
CBPO's boarding a ship.
U.S. CBP Office of Field Operations agent checking the authenticity of a travel document at an international airport using a stereo microscope
US and Canadian customs agents
Agriculture Specialists inspecting flower imports
Tape used by U.S. Customs and Border Protection to reseal packages that they have searched, and to indicate that they have done so
Border Patrol Agent reading the Miranda Rights to a suspect.
Border Patrol Agent badge
Agriculture Specialist badge
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A color guard composed of CBP officers and USBP agents at a Washington, D.C. ceremony in May, 2007.
A US Customs P-3 AEW on an anti-narcotic mission
A CBP UH-60 Blackhawk in flight
MQ-9 Guardian performs damage assessment left in the wake of Hurricane Ike

It is the largest federal law enforcement agency and works closely with U.S. Immigration and Customs Enforcement (ICE), Drug Enforcement Administration (DEA), and Federal Bureau of Investigation (FBI).

FBI Critical Incident Response Group

The Critical Incident Response Group (CIRG) is a division of the Criminal, Cyber, Response, and Services Branch of the United States Federal Bureau of Investigation.

Bin Laden circa 1997–1998

September 11 attacks

The September 11 attacks, commonly known as 9/11, were a series of four coordinated suicide terrorist attacks carried out by the militant Islamic extremist network al-Qaeda against the United States.

The September 11 attacks, commonly known as 9/11, were a series of four coordinated suicide terrorist attacks carried out by the militant Islamic extremist network al-Qaeda against the United States.

Bin Laden circa 1997–1998
Khalid Sheikh Mohammed after his capture in 2003
Map showing the attacks on the World Trade Center (Planes are not drawn to scale)
Diagram showing the attacks on the World Trade Center
Flight paths of the four planes
Collapse of the towers as seen from across the Hudson River in New Jersey
The north face of Two World Trade Center (South Tower) immediately after being struck by United Airlines Flight 175
World Trade Center site (Ground Zero) with an overlay showing the original building locations
Remains of 6, 7, and 1WTC
on September 17
Aerial view of the Pentagon
Satellite view of New York City on September 12, photographed by the Enhanced Thematic Mapper Plus (ETM+) camera aboard Landsat 7.
A portion of the World Trade Center bathtub at the National September 11 Memorial & Museum
Search and rescue teams inspect the wreckage at Ground Zero on September 13
President George W. Bush is briefed in Sarasota, Florida, where he learned of the attacks unfolding while he was visiting an elementary school.
Vladimir Putin (right) and his then-wife Lyudmila Putina (center) on November 16
U.S. soldiers in Afghanistan
Survivors covered in dust after the collapse of the towers
U.S. deficit and debt increases 2001–2008
Alleged "extraordinary rendition" illegal flights of the CIA, as reported by Rzeczpospolita.
Mohamed Atta, an Egyptian national, was the ringleader of the attacks.
The exterior support columns from the lower level of the South Tower remained standing after the building collapsed.
Rebuilt One World Trade Center nearing completion in July 2013
The United States flag flying at half-staff in New York City on September 11, 2014, the thirteenth anniversary of the attacks.
The Tribute in Light on September 11, 2006, the fifth anniversary of the attacks
Fritz Koenig’s monumental sculpture The Sphere in its final location in Liberty Park

Immediately after the attacks, the Federal Bureau of Investigation started PENTTBOM, the largest criminal inquiry in United States history.

Federal agencies often work with each other and with local law enforcement during official events, such as presidential visits to the United Nations General Assembly in New York City. Pictured are members of the US Secret Service, Diplomatic Security Service (DSS) and Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF)

Federal law enforcement in the United States

The federal government of the United States empowers a wide range of law enforcement agencies to maintain law and public order related to matters affecting the country as a whole.

The federal government of the United States empowers a wide range of law enforcement agencies to maintain law and public order related to matters affecting the country as a whole.

Federal agencies often work with each other and with local law enforcement during official events, such as presidential visits to the United Nations General Assembly in New York City. Pictured are members of the US Secret Service, Diplomatic Security Service (DSS) and Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF)
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CBP Officers and Border Patrol Agents at a ceremony in 2007
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An FBI agent at a crime scene
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A Bureau of Engraving and Printing Police (BEP) patrol car.
Two IRS-CI Special Agents conducting a search
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2016 Ford Police Interceptor Utility belonging to the US Postal Police, NYC

It has handled most law enforcement duties at the federal level and includes the United States Marshals Service (USMS), the Federal Bureau of Investigation (FBI), the Drug Enforcement Administration (DEA), the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), Federal Bureau of Prisons (BOP), and others.

The Trinity test of the Manhattan Project on 16 July 1945 was the first detonation of a nuclear weapon.

Manhattan Project

Research and development undertaking during World War II that produced the first nuclear weapons.

Research and development undertaking during World War II that produced the first nuclear weapons.

The Trinity test of the Manhattan Project on 16 July 1945 was the first detonation of a nuclear weapon.
Enrico Fermi, John R. Dunning, and Dana P. Mitchell in front of the cyclotron in the basement of Pupin Hall at Columbia University
March 1940 meeting at Berkeley, California: Ernest O. Lawrence, Arthur H. Compton, Vannevar Bush, James B. Conant, Karl T. Compton, and Alfred L. Loomis
Different fission bomb assembly methods explored during the July 1942 conference
Manhattan Project Organization Chart, 1 May 1946
Oppenheimer and Groves at the remains of the Trinity test in September 1945, two months after the test blast and just after the end of World War II. The white overshoes prevented fallout from sticking to the soles of their shoes.
Groves confers with James Chadwick, the head of the British Mission.
Shift change at the Y-12 uranium enrichment facility at the Clinton Engineer Works in Oak Ridge, Tennessee, on 11 August 1945. By May 1945, 82,000 people were employed at the Clinton Engineer Works. Photograph by the Manhattan District photographer Ed Westcott.
Physicists at a Manhattan District-sponsored colloquium at the Los Alamos Laboratory on the Super in April 1946. In the front row are Norris Bradbury, John Manley, Enrico Fermi and J. (Jerome) M. B. Kellogg (1905-1981). Robert Oppenheimer, in dark coat, is behind Manley; to Oppenheimer's left is Richard Feynman. The Army officer on the left is Colonel Oliver Haywood.
Map of Los Alamos site, New Mexico, 1943–45
Hanford workers collect their paychecks at the Western Union office.
The majority of the uranium used in the Manhattan Project came from the Shinkolobwe mine in Belgian Congo.
Oak Ridge hosted several uranium separation technologies. The Y-12 electromagnetic separation plant is in the upper right. The K-25 and K-27 gaseous diffusion plants are in the lower left, near the S-50 thermal diffusion plant. The X-10 was for plutonium production.
Alpha I racetrack at Y-12
Calutron Girls were young women who monitored calutron control panels at Y-12. Gladys Owens, seated in the foreground, was unaware of what she had been involved in.
Oak Ridge K-25 plant
The S-50 plant is the dark building to the upper left behind the Oak Ridge powerhouse (with smoke stacks).
Workers load uranium slugs into the X-10 Graphite Reactor.
Aerial view of Hanford B-Reactor site, June 1944
Map of the Hanford Site. Railroads flank the plants to the north and south. Reactors are the three northernmost red squares, along the Columbia River. The separation plants are the lower two red squares from the grouping south of the reactors. The bottom red square is the 300 area.
A row of Thin Man casings. Fat Man casings are visible in the background.
An implosion-type nuclear bomb
Remote handling of a kilocurie source of radiolanthanum for a RaLa Experiment at Los Alamos
The explosives of "the gadget" were raised to the top of the tower for the final assembly.
The Trinity test of the Manhattan Project was the first detonation of a nuclear weapon.
Major General Leslie R. Groves, Jr., speaks to service personnel Oak Ridge Tennessee in August 1945.
A billboard encouraging secrecy among Oak Ridge workers
Security poster, warning office workers to close drawers and put documents in safes when not being used
Allied soldiers dismantle the German experimental nuclear reactor at Haigerloch.
Silverplate B-29 Straight Flush. The tail code of the 444th Bombardment Group is painted on for security reasons.
Little Boy explodes over Hiroshima, Japan, 6 August 1945 (left);
Fat Man explodes over Nagasaki, Japan, 9 August 1945 (right).
Presentation of the Army–Navy "E" Award at Los Alamos on 16 October 1945. Standing, left to right: J. Robert Oppenheimer, unidentified, unidentified, Kenneth Nichols, Leslie Groves, Robert Gordon Sproul, William Sterling Parsons.
President Harry S. Truman signs the Atomic Energy Act of 1946, establishing the United States Atomic Energy Commission.
The Lake Ontario Ordnance Works (LOOW) near Niagara Falls became a principal repository for Manhattan Project waste for the Eastern United States. All of the radioactive materials stored at the LOOW site—including thorium, uranium, and the world's largest concentration of radium-226—were buried in an "Interim Waste Containment Structure" (in the foreground) in 1991.
A "bomb" (pressure vessel) containing uranium halide and sacrificial metal, probably magnesium, being lowered into a furnace
After the reaction, the interior of a bomb coated with remnant slag
A uranium metal "biscuit" from the reduction reaction

Lindorff, Dave, "Brothers against the Bureau: Ted Hall, the Soviet Union's youngest atomic spy, his rocket scientist brother Ed, and the untold story of how J. Edgar Hoover's biggest Manhattan Project bust was shut down", The Nation, vol. 314, no. 1 (10–17 January 2022), pp. 26–31.

The Alfred P. Murrah Federal Building two days after the bombing, viewed from across the adjacent parking lot

Oklahoma City bombing

Domestic terrorist truck bombing of the Alfred P. Murrah Federal Building in Oklahoma City, Oklahoma, United States, on April 19, 1995.

Domestic terrorist truck bombing of the Alfred P. Murrah Federal Building in Oklahoma City, Oklahoma, United States, on April 19, 1995.

The Alfred P. Murrah Federal Building two days after the bombing, viewed from across the adjacent parking lot
McVeigh and Nichols cited the federal government's actions against the Branch Davidian compound in the 1993 Waco siege (shown above) as a reason why they perpetrated the Oklahoma City bombing.
Alfred P. Murrah Federal Building as it appeared before its destruction
McVeigh's movement in the Ryder truck (red dashed line) and escape on foot (blue dashed line) on the day of the bombing
An aerial view, looking from the north, of the destruction
FBI sketch (left) and McVeigh (right).
McVeigh about to exit the Perry, Oklahoma, courthouse on April 21, 1995
Floor-by-floor diagram detailing the location of the victims in the Alfred P. Murrah Federal Building.
U.S. Air Force personnel and firefighters removing rubble in the rescue attempt
The Alfred P. Murrah Federal Building is demolished on May 23, 1995, over a month after the incident. The bomb was housed in a Ryder truck similar to the one visible in the lower left of the photograph.
Bill Clinton's notes for address to the Oklahoma City bombing victims on April 23, 1995
Charles Porter's photograph of firefighter Chris Fields holding the dying infant Baylee Almon won the Pulitzer Prize for Spot News Photography in 1996.
Rescue Team 5 remembers the victims who died in the bombing.
The site of the building after it was demolished, three months after the bombing

They expressed anger at the federal government's handling of the 1992 Federal Bureau of Investigation (FBI) standoff with Randy Weaver at Ruby Ridge, as well as the Waco siege, a 1993 51-day standoff between the FBI and Branch Davidian members that began with a botched Bureau of Alcohol, Tobacco, and Firearms (ATF) attempt to execute a search warrant.

American Mafia mobster Sam Giancana

Organized crime

Category of transnational, national, or local groupings of highly centralized enterprises run by criminals to engage in illegal activity, most commonly for profit.

Category of transnational, national, or local groupings of highly centralized enterprises run by criminals to engage in illegal activity, most commonly for profit.

American Mafia mobster Sam Giancana
Jamaican gang leader Christopher Coke
Drug trafficking routes in Mexico.
Tattooed Yakuza gangsters
From the 1950s to the 1970s, the Kowloon Walled City in British Hong Kong was controlled by local Chinese triads.

In 2001 International Organization for Migration estimated 400,000, the Federal Bureau of Investigation estimated 700,000 and UNICEF estimated 1.75 million.

A warrant canary, posted in a Craftsbury, Vermont library in 2005: "The FBI has not been here (watch very closely for removal of this sign)". Announcing the receipt of a national security letter would violate the associated gag order, while removing the sign would not.

Patriot Act

Landmark Act of the United States Congress, signed into law by President George W. Bush.

Landmark Act of the United States Congress, signed into law by President George W. Bush.

A warrant canary, posted in a Craftsbury, Vermont library in 2005: "The FBI has not been here (watch very closely for removal of this sign)". Announcing the receipt of a national security letter would violate the associated gag order, while removing the sign would not.

Opponents of the law have criticized its provision for indefinite detention of immigrants; permission to law enforcement to search a home or business without the owner's or the occupant's consent or knowledge under certain circumstances; the expanded use of National Security Letters, which allows the Federal Bureau of Investigation (FBI) to search telephone, email, and financial records without a court order; and the expanded access of law enforcement agencies to business records, including library and financial records.