Prevention -- Terrorism -- 27 International cooperation 7 Government policy -- 6 Prevention 6 Terrorism 6 Government policy 5 more ... National security -- 5 Law and legislation -- 3 Weapons of mass destruction 3 Foreign relations -- 2 History -- 2 History. -- 2 Politics and government -- 2 Athletes -- 1 Case studies 1 Civil rights -- 1 Congresses -- 1 Counterinsurgency -- 1 Criminal justice, Administration of -- 1 Deterrence(strategy) 1 Economic sanctions, American 1 Emergency communication system -- 1 Emergency management -- 1 Finance -- 1 History 1 Identification. -- 1 Intelligence officers -- 1 Internal security -- 1 International cooperation -- 1 less ...