National security 1,128 Prevention 281 Terrorism 269 Foreign relations 218 Government policy 196 Military policy 182 History 127 more ... National security -- United States 108 International relations 95 Intelligence service 87 Security measures 86 Evaluation 61 Politics and government 59 Security, International 58 Armed Forces 57 Defenses 55 Appropriations and expenditures 50 Diplomatic relations 48 Emergency management 46 Decision making 44 War on Terrorism, 2001-2009 44 Planning 41 World politics 40 Finance 37 Political aspects 37 Rules and practice 35 International cooperation 34 Civil defense 31 Management 30 Civil rights 27 less ...