Government policy Prevention Terrorism 52 National security 14 War on Terrorism, 2001-2009 12 History 11 International cooperation 7 more ... International relations 7 Law and legislation 7 Politics and government 6 Civil defense 5 Civil rights 5 Emergency management 5 Foreign relations 5 Internal security 5 Moral and ethical aspects 5 Security, International 5 AIDS (Disease) 4 Alcoholism 4 Drug abuse 4 Financial crises 4 Political aspects 4 Public health 4 Religious aspects 4 Research 4 Security measures 4 Treatment 4 Children 3 Crimes against 3 Defenses 3 less ...