Civil defense -- 12 Terrorism -- 8 National security -- 5 Defenses 4 Prevention. -- 4 Civil defense 3 Emergency management -- 3 more ... Prevention -- 3 Internal security -- 2 War on Terrorism, 2001-2009 2 Armed Forces -- 1 Citizen participation -- 1 Civil rights -- 1 Disaster relief 1 Disaster relief -- 1 Government policy -- 1 Harbors -- 1 History 1 History. -- 1 Law enforcement -- 1 Malaysia 1 Merchant marine -- 1 Military planning -- 1 National security 1 Organization 1 Police -- 1 Politics and government -- 1 Prevention 1 Security measures 1 Security measures -- 1 less ...