Internal security National security 88 Politics and government 78 History 65 Prevention 37 Terrorism 35 Security, International 26 more ... Intelligence service 25 Foreign relations 24 Political aspects 22 Police 20 Postwar reconstruction 17 Armed Forces 16 Social aspects 16 Civil rights 15 Insurgency 15 Crime prevention 14 Government policy 14 Military policy 14 Nation-building 12 Violence 12 Law and legislation 11 Drug traffic 10 Electronic surveillance 10 Emigration and immigration 10 Military assistance, American 10 Anti-communist movements 9 Cold War 9 Drug control 9 Law enforcement 9 less ...