Terrorism -- War on Terrorism, 2001-2009 Foreign relations -- 6 Government policy -- 5 Politics and government -- 4 Civil rights -- 2 National security -- 2 more ... Prevention 2 September 11 Terrorist Attacks, 2001 2 Civil defense 1 Civil defense -- 1 Combatants and noncombatants (International Law) 1 Defenses 1 Detention of persons -- 1 Executive power -- 1 Foreign public opinion 1 Globalization 1 Harbors -- 1 Legal status, laws, etc -- 1 Merchant marine -- 1 National security 1 Prevention -- 1 Prevention. -- 1 Security measures 1 Security measures -- 1 Terrorists -- 1 War (International law) 1 War and emergency powers -- 1 World politics -- 1 less ...