Government policy -- Terrorism -- Prevention -- 6 War on Terrorism, 2001-2009 5 Foreign relations -- 4 Prevention. -- 4 National security -- 3 more ... Aeronautics, Commercial -- 2 Economic sanctions, American 2 Evaluation. -- 2 Intelligence service -- 2 Politics and government 2 Politics and government -- 2 Relations 2 Security measures 2 Terrorism 2 Case studies 1 Governmental investigations -- 1 History -- 1 History. -- 1 Islam 1 Jihad 1 Political violence -- 1 Religious aspects -- 1 September 11 Terrorist Attacks, 2001 1 Subversive activities -- 1 Terrorists -- 1 World politics -- 1 less ...