Terrorism -- Prevention -- 21 Prevention 17 Terrorism 13 Government policy -- 12 National security -- 9 Islam 7 more ... Religious aspects -- 7 Foreign relations -- 6 History -- 6 International cooperation 5 War on terrorism, 2001- 5 Case studies 4 Civil rights -- 3 Foreign relations 3 Military policy 3 Political aspects 3 Radicalism -- 3 Weapons of mass destruction 3 Case studies -- 2 Child terrorists 2 Civil defense -- 2 Defenses 2 Government policy 2 Government publications -- 2 International relations 2 Islam and politics -- 2 Islamic fundamentalism -- 2 Pirates -- 2 Political aspects -- 2 less ...