National security -- 417 Foreign relations -- 103 National security 99 Politics and government -- 72 Military policy 59 Foreign relations 58 World politics -- 41 more ... Congresses -- 40 Terrorism -- 37 Congresses 36 Defenses 33 Politics and government 29 Security, International 29 Strategic aspects 25 History -- 17 Government policy -- 13 International relations 13 Military relations -- 13 Prevention -- 13 International cooperation 12 Prevention. -- 12 Armed Forces 11 Economic conditions -- 11 Regionalism -- 11 Relations -- 11 History 10 Economic aspects 9 Nuclear weapons -- 9 Decision making 8 Defenses -- 8 less ...