Terrorism -- Foreign relations -- 18 Government policy -- 13 Prevention -- 10 History -- 8 Politics and government -- 7 National security -- 6 more ... Prevention. -- 6 War on Terrorism, 2001-2009 4 Defenses 3 Military policy 3 Politics and government 3 Case studies 2 Civil defense -- 2 Cold War 2 Democracy -- 2 Drug traffic -- 2 Economic sanctions, American 2 Foreign relations 2 Intelligence service -- 2 Islam 2 Islam and politics -- 2 Islamic fundamentalism 2 Islamic fundamentalism -- 2 Political aspects 2 Political aspects -- 2 Relations 2 Religious aspects -- 2 Security measures 2 September 11 Terrorist Attacks, 2001 2 less ...