National security -- 419 Security, International 283 Foreign relations -- 139 National security 99 Foreign relations 88 Military policy 88 Politics and government -- 78 more ... World politics -- 76 Security, International -- 71 Terrorism -- 56 Congresses 52 International relations 48 Congresses -- 44 Politics and government 44 Defenses 40 Peace 33 Security measures 32 International cooperation 31 Strategic aspects 31 Arms control 24 Terrorism 24 Armed Forces 23 History -- 23 Internal security -- 23 Arms control -- 22 Government policy -- 20 Prevention -- 18 Prevention. -- 18 Law and legislation -- 17 Military relations -- 17 less ...