Arms control Nuclear weapons 75 Nuclear nonproliferation 74 Disarmament 65 International relations 64 Export controls 62 Verification 56 Armed Forces 51 Biological warfare 47 Foreign relations 47 Defenses 46 Military weapons 45 Nuclear arms control 44 Weapons of mass destruction 41 Law and legislation 34 Arms transfers 32 Security, International 30 Economic assistance 28 International cooperation 27 National security 27 Military policy 26 Appropriations and expenditures 24 Diplomatic relations 22 Nuclear energy 22 Petroleum 22 Defense spending 21 Missile attack warning systems 20 Nuclear disarmament 20 Bibliography 19 Technology transfer 19