Terrorism -- Prevention -- 22 Prevention 18 Government policy -- 17 Religious aspects -- 16 Islam 15 Terrorism 13 more ... Foreign relations -- 10 History -- 9 National security -- 9 Politics and government -- 8 War on terrorism, 2001- 8 International cooperation 5 Islam and politics -- 5 Jihad 5 Political aspects 5 Case studies 4 Islamic fundamentalism -- 4 Military policy 4 September 11 Terrorist Attacks, 2001 4 Civil rights -- 3 Foreign relations 3 Radicalism -- 3 Terrorists -- 3 Weapons of mass destruction 3 World politics -- 3 Biography -- 2 Case studies -- 2 Child terrorists 2 Civil defense -- 2 less ...