Prevention -- Terrorism -- 68 National security -- 19 Government policy -- 16 Terrorism 13 International cooperation 12 Prevention 10 more ... Government policy 9 Congresses 7 Emergency management -- 7 Congresses -- 6 History -- 5 Civil rights -- 4 Foreign relations -- 4 Weapons of mass destruction 4 Civil defense -- 3 Fiction 3 History. -- 3 Law and legislation -- 3 Military policy 3 Politics and government -- 3 Security measures -- 3 AIDS (Disease) -- 2 Conflict management -- 2 Counterinsurgency -- 2 Defenses 2 Drug abuse -- 2 Economic sanctions, American 2 History 2 Intelligence officers -- 2 less ...