Terrorism -- Foreign relations -- 9 Government policy -- 8 Prevention -- 8 History -- 6 Case studies 2 Defenses 2 more ... Military policy 2 National security -- 2 September 11 Terrorist Attacks, 2001 2 War on terrorism, 2001- 2 Asymmetric warfare -- 1 Case studies -- 1 Civil defense -- 1 Cold War 1 Counterinsurgency -- 1 Cross- cultural studies 1 Democracy -- 1 Drug traffic -- 1 Economic sanctions, American 1 Emergency management -- 1 Foreign relations 1 Government policy 1 Guerrillas -- 1 Insurgency -- 1 Iraq War, 2003- -- 1 Islam and politics -- 1 Islamic fundamentalism 1 Islamic fundamentalism -- 1 Political aspects 1 less ...