Prevention Terrorism -- Terrorism 26 Prevention -- 9 Government policy 8 War on Terrorism, 2001-2009 7 Security measures 6 more ... Islam 5 Psychological aspects 5 Religious aspects -- 5 International cooperation 4 Security, International 4 Social aspects 4 Terrorists -- 4 War on terrorism, 2001- 4 Child terrorists 3 Democracy 3 Finance 3 Finance -- 3 Foreign relations 3 History 3 Law and legislation 3 Liberalism 3 Psychology 3 Aeronautics, Commercial -- 2 Airports -- 2 Government publications -- 2 Hijacking of aircraft -- 2 Hostage negotiations 2 Human rights 2 less ...