National security -- Foreign relations -- 15 Military policy 10 Terrorism -- 7 World politics -- 7 Prevention -- 6 Foreign relations 5 more ... Defenses 4 Government policy -- 4 History -- 4 Civil rights -- 3 Decision making -- 3 History 3 Politics and government -- 3 Relations -- 3 Security, International 3 Armed forces 2 Civil defense -- 2 Decision making 2 Defenses -- 2 Economic aspects 2 International cooperation 2 Military relations -- 2 National security 2 Strategic aspects 2 War on terrorism, 2001- 2 Alliances -- 1 Appropriations and expenditures 1 Armed Forces 1 Constructing out -- 1 less ...