Terrorism -- 6 War on Terrorism, 2001-2009 Government policy -- 3 Politics and government -- 3 Prevention. -- 3 Security measures 3 Aeronautics, Commercial -- 2 more ... Evaluation. -- 2 Prevention 2 Civil defense 1 Civil defense -- 1 Civil rights -- 1 Combatants and noncombatants (International Law) 1 Counterinsurgency -- 1 Defenses 1 Detention of persons -- 1 Executive power -- 1 Foreign relations -- 1 Harbors -- 1 Legal status, laws, etc -- 1 Merchant marine -- 1 National security 1 National security -- 1 Prevention -- 1 Security measures -- 1 Special forces (Military science) -- 1 Terrorists -- 1 War (International law) 1 War and emergency powers -- 1 World politics -- 1 less ...