Terrorism -- Prevention -- 14 Government policy -- 13 Foreign relations -- 9 History -- 8 National security -- 6 War on terrorism, 2001- 5 more ... Civil rights -- 3 September 11 Terrorist Attacks, 2001 3 Terrorism 3 Terrorists -- 3 Case studies 2 Civil defense -- 2 Defenses 2 Islamic fundamentalism -- 2 Military policy 2 Political aspects -- 2 Politics and government -- 2 Prevention 2 Prevention. -- 2 Psychological aspects 2 Asymmetric warfare -- 1 Biography -- 1 Case studies -- 1 Cold War 1 Cold War -- 1 Counterinsurgency -- 1 Cross- cultural studies 1 Democracy -- 1 Disasters -- 1 less ...