National security Terrorism Prevention 20 Government policy 11 War on Terrorism, 2001-2009 8 Civil defense 3 Defenses 3 more ... History 3 Intelligence service 3 September 11 Terrorist Attacks, 2001 3 Emergency management 2 Evaluation 2 Foreign relations 2 Internal security 2 International cooperation 2 International relations 2 Law and legislation 2 Security, International 2 Social aspects 2 Biometric identification 1 Cost effectiveness 1 Costs 1 Criminal justice, Administration of 1 Fear 1 Finance 1 Governmental investigations 1 Nuclear terrorism 1 Nuclear weapons 1 Paranoia 1 Parliamentary practice 1 less ...