Terrorism -- 114 Terrorism 63 Prevention 22 Foreign relations -- 19 War on terrorism, 2001- 18 Islam 12 National security -- 12 more ... Religious aspects -- 12 Prevention -- 11 History -- 10 Security, International 9 International relations 8 September 11 Terrorist Attacks, 2001 8 Government policy -- 7 Military policy 7 World politics -- 7 Politics and government 6 Terrorists -- 6 Congresses 5 Foreign relations 5 Islamic fundamentalism -- 5 Political aspects 5 Politics and government -- 5 Weapons of mass destruction 5 Case studies 4 Democracy 4 Globalization -- 4 International cooperation 4 International offenses 4 Jihad 4 less ...