War on Terrorism, 2001-2009 42 Terrorism -- 24 Foreign relations -- 13 Government policy -- 9 Politics and government -- 7 Prevention 7 September 11 Terrorist Attacks, 2001 7 more ... National security -- 6 Terrorism 6 Prevention. -- 5 Iraq War, 2003-2011 4 Military policy 4 War on Terrorism, 2001-2009 -- 4 World politics -- 4 Evaluation. -- 3 Influence 3 Intelligence service -- 3 Islam 3 Islamic fundamentalism 3 Security measures 3 September 11 Terrorist Attacks, 2001 -- 3 Aeronautics, Commercial -- 2 Civil defense -- 2 Civil rights -- 2 Defenses 2 Detention of persons -- 2 Executive power -- 2 Legal status, laws, etc -- 2 Religious aspects -- 2 Social aspects 2 less ...