National security -- Foreign relations -- 15 Military policy 11 World politics -- 5 Foreign relations 4 Relations -- 4 Security, International 4 more ... Decision making -- 3 Defenses 3 History 3 History -- 3 International cooperation 3 Prevention -- 3 Terrorism -- 3 Armed forces 2 Decision making 2 Defenses -- 2 Economic aspects 2 Government policy -- 2 Politics and government -- 2 Alliances -- 1 Appropriations and expenditures 1 Armed Forces 1 Civil defense -- 1 Constructing out -- 1 Cross- cultural studies 1 Cyberterrorism -- 1 Deterrence (Strategy) 1 Developing countries -- 1 Economic conditions -- 1 less ...