Terrorism Terrorism -- 77 Prevention 33 Prevention -- 14 World politics -- 14 Terrorists 10 Security, International 9 more ... Political violence 8 History 7 Forecasting 6 International relations 6 Terrorists -- 6 War on terrorism, 2001- 6 Weapons of mass destruction 6 Foreign relations -- 5 Government policy -- 5 Radicalism 5 September 11 Terrorist Attacks, 2001 5 Foreign relations 4 Government policy 4 International cooperation 4 International law 4 National security -- 4 Violence 4 Fanaticism 3 Globalization 3 Guerrilla warfare 3 Hijacking of aircraft 3 History -- 3 Islam 3 less ...