National security 650 Security, International 327 Foreign relations 157 Military policy 155 Thesis 130 Security measures 121 Dissertations, Academic 90 Computer security 88 Politics and government 81 World politics 81 Terrorism 71 Defenses 70 Prevention 68 Congresses 60 International relations 55 Computer networks 51 Strategic aspects 51 History 48 Armed Forces 38 Government policy 37 Law and legislation 35 United States 35 Internal security 33 National Security 29 Pacific Area 28 Strategy 28 Arms control 26 International cooperation 25 Asia 23 Data protection 23