Terrorism -- Foreign relations -- 25 Government policy -- 20 Politics and government -- 13 Prevention -- 9 War on Terrorism, 2001-2009 8 National security -- 7 more ... Foreign relations 6 Prevention. -- 6 September 11 Terrorist Attacks, 2001 6 History -- 5 Military policy 5 Political aspects 5 Prevention 5 Terrorism 5 Political aspects -- 4 Case studies 3 Defenses 3 Politics and government 3 War on terrorism, 2001- 3 World politics -- 3 Case studies -- 2 Civil defense -- 2 Civil rights -- 2 Cold War 2 Democracy -- 2 Drug traffic -- 2 Economic sanctions, American 2 Globalization -- 2 Intelligence service -- 2 less ...