Terrorism -- Government policy -- 27 Prevention -- 23 Prevention. -- 23 National security -- 17 Foreign relations -- 16 War on Terrorism, 2001-2009 11 more ... History -- 9 Terrorism 9 Islam 8 Politics and government -- 8 Religious aspects -- 8 Civil defense -- 6 Civil rights -- 6 Prevention 6 September 11 Terrorist Attacks, 2001 6 Security measures 5 Islamic fundamentalism -- 4 Political aspects -- 4 Politics and government 4 Security measures -- 4 War on terrorism, 2001- 4 Aeronautics, Commercial -- 3 Defenses 3 Emergency management -- 3 Government policy 3 Intelligence service -- 3 Islam and politics -- 3 Islamic fundamentalism 3 Jihad 3 less ...