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Central Intelligence Agency
The Central Intelligence Agency (CIA) is an independent agency of the U.S. government responsible for amassing and assessing foreign intelligence to aid the president, the National Security Council (NSC), and other officials in making national security decisions. Such information is considered to be the first line of defense against terrorism.
In 1947, as a direct result of the intelligence failure that allowed Japan's surprise attack on Pearl Harbor, U.S. president Harry S. Truman signed the National Security Act, which established the NSC and the CIA. The CIA grew out of the World War II Office of Strategic Services (OSS), run by General William “Wild Bill” Donavan, who recruited from Wall Street and Ivy League schools to form an elite intelligence group based on the East Coast, with an emphasis on covert action abroad. Originally, the CIA operated only outside the United States and was prohibited from collecting intelligence about domestic activities of its citizens. Domestic intelligence was the responsibility of the Federal Bureau of Investigation (FBI).

The damaged U.S. embassy in Beirut, Lebanon, after a truck bombing that killed 63. The attack, on April 18, 1983, wiped out the entire Central Intelligence Agency Middle East contingent, including station chief Kenneth Haas.
Most CIA operations during its early years involved supporting anticommunist forces in foreign countries. By the 1970s, however, the CIA was working inside the United States. Throughout the 1960s and early 1970s, the CIA, through Operation CHAOS, assembled mountains of intelligence, domestically, on war protestors and black nationalists. The CIA justified its actions by maintaining that such antigovernment activities must be sponsored by a foreign state. Revelations about brutal CIA activities in Vietnam and assassination plots against several leaders, including Fidel Castro and Patrice Lumumba, also marred the agency's reputation and indicated a need for reform.
In the post-Watergate 1970s, the U.S. Congress authorized the Church and Pike Committee to investigate the CIA; its findings led to a series of directives. In 1976, President Gerald Ford prohibited CIA assassinations of political leaders. In 1978, President Jimmy Carter signed the Foreign Intelligence Surveillance Act, which curtailed the CIA's ability to gather foreign intelligence within the United States. Some restrictions were lifted, however, by Executive Order No. 12333, signed by President Ronald Reagan in December 1981. This order allowed domestic electronic surveillance and physical searches in response to a growing threat of Soviet spies within U.S. borders.
Concurrently, terrorism in the Middle East was becoming a top concern. The early 1980s saw a great number of bombings, hijackings, and kidnappings. War-torn Lebanon became a center of terrorist activity. In 1983, the entire staff of a CIA station—six operatives in total—was killed, along with 57 others, when a suicide bomber targeted the U.S. embassy in Beirut. The Beirut station chief was replaced by William Buckley, who was kidnapped by Islamic militants in 1984 and died in captivity.
These terrorist incidents led CIA director William Casey to develop the Counterterrorism Center (CTC) in 1986, with the mission to “preempt, disrupt and defeat” terrorists and to coordinate the intelligence community's counterterrorist activities. Although staffed with approximately 200 officers, the CTC was considered by many to be a paper-pushing outfit. The CIA's clandestine operations wing, the Directorate of Operations (DO), still controlled espionage activities overseas.
Downfall Decade
After the fall of the Soviet Union in 1991, the CIA, long used to functioning under the Soviet threat, began to downsize operations in the Middle East, even as six new Islamic states emerged in Central Asia. By the mid-1990s, eight CIA stations in the area known as the “South Group” were closed, leaving a gaping hole in Middle Eastern intelligence, even as rumblings of fundamentalist dissent grew louder throughout the region. Robert Baer, considered one of the best CIA operatives in the Middle East, complained that “the CIA closed down in the '90s.” Baer left the agency in 1997.
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- Abu Nidal Organization
- Agricultural Terrorist Activities
- Al Fatah
- Al Qaeda
- United States v. Usama Bin Laden et al. Indictment
- United States v. Zacarias Moussaoui Indictment
- Abullah, Abdullah Ahmed
- Aden-Abyan Islamic Army
- Al Qaeda
- Al-'Owhali, Mohamed Rashed
- Al-Adel, Saif
- Al-Liby, Anas
- Al-Mughassil, Ahmad Ibrahim
- Al-Nasser, Abdelkarim Hussein Mohamed
- Al-Yacoub, Ibrahim Salih Mohammed
- Al-Zawahiri, Ayman
- Ali, Ahmed Mohamed Hamed
- Atef, Muhammad
- Atta, Mohamed
- Atwah, Muhsin Musa Matwalli
- Bin Laden, Osama
- East African Embassy Bombings
- El-Hage, Wadih
- Fadhil, Mustafa Mohamed
- Fatwa
- Financing Terrorism
- Ghailani, Ahmed Khalfan
- Jihad
- Militant Islam
- Mohamed, Khalfan Khamis
- Mohammed, Fazul Abdullah
- Mohammed, Khalid Shaikh
- Moussaoui, Zacarias
- Msalam, Fahid Mohammed Ally
- Odeh, Mohamed Sadeek
- Reid, Richard
- September 11 Attacks
- Swedan, Sheikah Ahmed Salim
- Taliban
- Transnational Terrorism
- U.S.S. Cole Bombing
- War on Terrorism
- Yousef, Ramzi Ahmed
- Zubaydah, Abu
- Animal Rights Terrorist Activities
- Antiabortion Terrorist Activities
- Biological Terrorist Activities
- Bombings
- 15 May Organization
- Air India Flight 182 Bombing
- Birmingham Pub Bombings
- Bombings and Bomb Scares
- Canary Wharf Bombing
- Centennial Park Bombing
- Copeland, David
- East African Embassy Bombings
- FALN
- Fraunces Tavern Bombing
- Grand Central Station Bombing
- Khobar Towers Bombing
- King David Hotel Bombing
- La Belle Discotheque Bombing
- La Guardia Airport Bombing
- Metesky, George
- Oklahoma City Bombing
- Omagh Bombing
- Pan Am Flight 103 Bombing
- Puerto Rican Nationalist Terrorism
- Revolutionary People's Struggle
- Riyadh Saudi Arabia Bombing
- Sixteenth Street Baptist Church Bombing
- Statue of Liberty Bombing
- Subway Suicide Bombing Plot
- Tripoli and Benghazi Bombing
- U.S. Embassy Bombing, Beirut
- U.S. Marine Barracks Bombing, Beirut
- U.S.O. Club Bombing
- U.S.S. Cole Bombing
- Unabomber
- Wall Street Bombing
- World Trade Center Bombing (1993)
- Chemical Terrorist Activities
- Embassy Bombing in Beirut, Lebanon, April 1983
- Embassy Bombings in Dar Es Salaam, Tanzania, and Nairobi, Kenya, August 1998
- Environmental Terrorist Activities
- Government Responses to Terrorism
- United States v. Usama bin Laden et al. Indictment (United States)
- United States v. Zacarias Moussaoui Indictment (United States)
- Bureau of Alcohol, Tobacco and Firearms (United States)
- Central Intelligence Agency (United States)
- Counterterrorism
- Delta Force (United States)
- Department of Justice, U.S. (United States)
- Federal Bureau of Investigation (United States)
- Federal Emergency Management Agency (United States)
- FPCON Levels (United States)
- Grenzschutzgruppe 9 (Germany)
- Homeland Security, Office of (United States)
- Mossad (Israel)
- National Security Agency (United States)
- National Security Council (United States)
- Operation Eagle Claw (United States)
- Patriot Act (United States)
- Rewards for Justice (United States)
- Sayeret Matkal (Israel)
- SEAL Team Six (United States)
- Special Air Service Regiment (Great Britain and Australia)
- Special Operations Wing (United States)
- United Nations
- War on Terrorism (United States)
- Wrath of God (Israel)
- Hamas
- Hezbollah
- Hijackings
- Achille Lauro Hijacking
- Abu Nidal Organization
- Hezbollah
- Hijacking
- Palestine Liberation Front–Abu Abbas Faction
- Palestine Liberation Organization
- Pan Am Flight 73 Hijacking
- Popular Front for the Liberation of Palestine
- Stockholm Syndrome
- TWA Flight 355 Hijacking
- TWA Flight 840 Hijacking
- TWA Flight 847 Hijacking
- Hostage Taking/Kidnappings
- Jihad: Concept of Jihad
- Groups
- Khobar Towers Bombing in Dhahran, Saudi Arabia, June 1996
- Lebanon Hostage Crisis
- Marine Barracks Bombing in Beirut, Lebanon, October 1983
- Members of Terrorist Groups, Freelance Terrorists, and Terrorist Supporters
- Abbas, Muhammed “Abu”
- Al-'Owhali, Mohamed Rashed
- Al-Adel, Saif
- Al-Banna, Sabri
- Al-Liby, Anas
- Al-Mughassil, Ahmad Ibrahim
- Al-Nasser, Abdelkarim Hussein Mohamed
- Al-Yacoub, Ibrahim Salih Mohammed
- Al-Zawahiri, Ayman
- Ali, Ahmed Mohamed Hamed
- Arafat, Yasir
- Arocena, Eduardo
- Asahara, Shoko
- Atef, Muhammad
- Atta, Mohamed
- Atwa, Ali
- Atwah Muhsin Musa Matwalli
- Ayyash, Yahya
- Baader, Andreas
- Berenson, Lori
- Bin Laden, Osama
- Boudin, Katherine
- Chesimard, Joanne
- Copeland, David
- Coronado, Rodney
- Dohrn, Bernardine
- El-Hage, Wadih
- El-Hoorie, Ali Saed bin Ali
- Ellerman, Josh
- Ellison, James
- Fadhil, Mustafa Mohamed
- Fadlallah, Sheikh Muhammad Hussein
- Ghailani, Ahmed Khalfan
- Goldstein, Baruch
- Griffin, Michael
- Guevara, Ernesto (Che)
- Guzmán, Abimael
- Habash, George
- Hawetmeh, Najib
- Hearst, Patty
- Hill, Paul
- Hussein, Saddam
- Izz-al-Din, Hasan
- Jibril, Ahmed
- Kahane, Meir
- Kasi, Mir Aimal
- Khaled, Leila
- Kikumura, Yu
- Marighella, Carlos
- Marzook, Musa (Mousa) Mohammed Abu
- Mathews, Robert Jay
- McVeigh, Timothy
- Meinhof, Ulrike
- Metesky, George
- Miller, Frazier Glenn
- Mohamed, Khalfan Khamis
- Mohammed, Fazul Abdullah
- Mohammed, Khalid Shaikh
- Moussaoui, Zacarias
- Msalam, Fahid Mohammed Ally
- Mughniyah, Imad Fayez
- Nasrallah, Sheik Hassan
- Nichols, Terry Lynn
- Nosair, El Sayyid
- Ocalan, Abdullah
- Odeh, Mohamed Sadeek
- Qaddafi, Muammar el-
- Rahman, Omar Abdel
- Rajneesh, Bhagwan Shree
- Reid, Richard
- Ressam, Ahmed
- Rudolph, Eric
- Sánchez, Ilich Ramírez (Carlos the Jackal)
- Scutari, Richard
- Shallah, Ramadan Abdullah
- Shigenobu, Fusako
- Snell, Richard Wayne
- Swedan, Sheikah Ahmed Salim
- Unabomber
- Yasin, Abdul Rahman
- Younis, Fawaz
- Yousef, Ramzi Ahmed
- Zubaydah, Abu
- Methods Used by Terrorists
- Nationalistic and Religious Terrorist Groups
- Central America
- East Asia and Southeast Asia
- Europe
- Baader-Meinhof Gang (West Germany)
- Basque Fatherland and Liberty (Basque region of Spain)
- Basque Separatists (Basque region of Spain)
- First of October Antifascist Resistance Group (Spain)
- German Red Army Faction (Germany)
- Islamic Army for the Liberation of Holy Places
- Kosovo Liberation Army (Kosovo)
- National Liberation Front of Corsica (Corsica)
- Ordine Nuovo (Italy)
- Red Brigades (Brigades Rosse) (Italy)
- Revolutionary Organization 17 November (Greece)
- Revolutionary People's Struggle (Greece)
- Middle East, Central Asia, and South Asia
- 15 May Organization (Palestine, Iraq)
- Abu Nidal Organization (Iraq, Syria, Libya)
- Aden Abyan Islamic Army (Yemen)
- Al 'Asifa (Palestine)
- Al Aqsa Martyrs Brigades (Palestine)
- Al Fatah (Palestine)
- Al Qaeda (Afghanistan, Saudi Arabia, other Middle Eastern countries; North and South America; Europe; Philippines)
- Armenian Secret Army for the Liberation of Armenia (Turkey)
- Democratic Front for the Liberation of Palestine (Palestine)
- Force 17 (Palestine)
- Great Eastern Islamic Raiders' Front (Turkey)
- Grey Wolves (Turkey)
- Hamas (Palestine)
- Harakat ul-Mujahidin (India-Pakistan)
- Hezbollah (Lebanon)
- Hizb-ul-Mujahideen (India-Pakistan)
- Irgun Zvai Leumi (Israel)
- Islamic Movement of Uzbekistan (Uzbekistan)
- Jaish-e-Mohammed (Pakistan)
- Kahane Chai (Israel)
- Kurdistan Workers Party (Turkey)
- Lashkar-e-Tayyiba (India-Pakistan)
- Liberation Tigers of Tamil Eelam (Sri Lanka)
- Mujahedin-e-Khalq Organization (Iran)
- Mujahideen (Afghanistan)
- Palestine Liberation Front–Abu Abbas Faction (Lebanon, Tunisia, Iraq)
- Palestine Liberation Organization (Palestine)
- Palestinian Islamic Jihad (Palestine, Syria)
- Popular Front for the Liberation of Palestine (Palestine)
- Popular Front for the Liberation of Palestine–General Command (Palestine)
- Revolutionary People's Liberation Front (Turkey)
- Sikh Terrorism (India)
- Stern Gang (Israel)
- Taliban (Afghanistan)
- Turkish Hezbollah (Turkey)
- Wrath of God (Israel)
- North America and West Indies
- Black Panther Party (United States)
- El Rukns (United States)
- FALN (Puerto Rico, United States)
- Hanafi Muslim Movement (United States)
- Jamaat ul-Fuqra (United States, Kashmir, Pakistan)
- Jewish Terrorist Groups in the United States (United States)
- Macheteros (Puerto Rico)
- May 19 Communist Organization (United States)
- Omega 7 (Cuba)
- Puerto Rican Nationalist Terrorism (Puerto Rico)
- Symbionese Liberation Army (United States)
- United Freedom Front (United States)
- Weatherman (United States)
- South America
- Lautaro Youth Movement (Chile)
- Manuel Rodriquez Patriotic Front (Chile)
- Movement of the Revolutionary Left (Chile)
- National Liberation Army (Bolivia)
- National Liberation Army (Colombia)
- People's Liberation Army (Colombia)
- Revolutionary Armed Forces of Colombia (Colombia)
- Shining Path (Peru)
- Tupac Amaru Revolutionary Movement (Peru)
- Tupac Katari Guerrilla Army (Bolivia)
- United Self-Defense Forces of Colombia (Colombia)
- United Kingdom
- Al Muhajiroun (United Kingdom)
- Continuity Irish Republican Army (Northern Ireland)
- Irish National Liberation Army (Northern Ireland)
- Irish Republican Army (Northern Ireland)
- Loyalist Volunteer Force (Northern Ireland)
- Orange Volunteers (Northern Ireland)
- Real Irish Republican Army (Northern Ireland)
- Red Hand Defenders (Northern Ireland)
- Ulster Defense Association (Northern Ireland)
- Ulster Freedom Fighters (Northern Ireland)
- Ulster Volunteer Force (Northern Ireland)
- Oklahoma City Federal Building Bombing, April 1995
- Palestine Liberation Front–Abu Abbas Faction
- Right-Wing Militia Movements
- September 11, 2001, Attacks
- Terrorism and the Media
- Theoretical Perspectives on Terrorism
- Anarchism
- April 19
- Asymmetrical Warfare
- Bakunin, Michael
- Fatwa
- Financing Terrorism
- Freedom Fighters
- Freelance Terrorism
- Jihad
- Kropotkin, Peter
- Leaderless Resistance
- Militant Islam
- Persian Gulf War
- State Terrorism
- State-Sponsored Terrorism
- Stockholm Syndrome
- Suicide Bombers
- Terrorism, Definition and History of
- Transnational Terrorism
- United Nations
- War on Terrorism
- White Supremacist Terrorist Activities in the United States
- The Turner Diaries
- Aryan Nations
- Aryan Republican Army
- Covenant, the Sword, and the Arm of the Lord
- Ellison, James
- Fort Smith, Arkansas, Trial
- Ku Klux Klan
- Mathews, Robert Jay
- Miller, Frazier Glenn
- Scutari, Richard
- Sixteenth Street Baptist Church Bombing
- Skinheads
- Snell, Richard Wayne
- The Order
- White Patriot Party
- White Supremacy
- World Trade Center Bombing, February 1993
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