Government policy -- Terrorism -- 9 War on Terrorism, 2001-2009 Foreign relations -- 5 Evaluation. -- 3 National security -- 3 Prevention. -- 3 more ... September 11 Terrorist Attacks, 2001 3 Aeronautics, Commercial -- 2 Intelligence service -- 2 Politics and government -- 2 Security measures 2 Civil rights -- 1 Foreign public opinion 1 Governmental investigations -- 1 Political violence -- 1 Prevention -- 1 World politics -- 1 less ...