Prevention. -- Terrorism -- 25 National security -- 8 Government policy -- 7 Terrorists -- 4 Civil defense -- 3 Politics and government -- 3 more ... Prevention 3 Security measures 3 War on Terrorism, 2001-2009 3 Aeronautics, Commercial -- 2 Civil rights -- 2 Evaluation. -- 2 Foreign relations -- 2 Islam 2 Religious aspects -- 2 Terrorism 2 Air power -- 1 Business -- 1 Business enterprises -- 1 Cold War -- 1 Combatants and noncombatants (International Law) 1 Cyberterrorism -- 1 Detention of persons -- 1 Economic aspects 1 Effect of terrorism on 1 Emergency management -- 1 Executive power -- 1 Finance 1 Finance -- 1 less ...