Terrorism Prevention National security 310 Rules and practice 101 Emergency management 76 Evaluation 73 Intelligence service 71 National security Law and legislation 69 Management 55 War on Terrorism, 2001-2009 55 Terrorism 51 September 11 Terrorist Attacks, 2001 48 Terrorism Religious aspects Islam 48 Intergovernmental cooperation 46 Terrorism Government policy 45 Interagency coordination 44 Harbors Security measures 43 Foreign relations 38 Islamic fundamentalism 38 Airports Security measures 33 Terrorism Risk assessment 32 Privacy, Right of 31 Transportation Security measures 30 Aeronautics, Commercial Security measures 29 Civil defense 29 Civil rights 26 Airline passenger security screening 25 Jihad 25 Terrorists 25 Military policy 24 Ports of entry Security measures 24 Shipping Security measures 23 Armed Forces 22 Border security 22 Defenses 22 Cyberterrorism Prevention 20 Terrorists Recruiting 20 Terrorists Travel Prevention 20 Illegal aliens Government policy 19 Internal security 19 Emigration and immigration law 18 Intelligence service Law and legislation 18 Law enforcement 18 Marine terminals Security measures 18 Security measures 18 Intelligence service Evaluation 17 Politics and government 17 Terrorists Identification 17 Appropriations and expenditures 16 Criminal investigation 16 Domestic terrorism Prevention 16 more ...