War on terrorism, 2001- Terrorism -- 13 Foreign relations -- 10 September 11 Terrorist Attacks, 2001 6 Terrorism 6 Prevention 5 World politics -- 5 more ... Prevention -- 4 Globalization 3 Government policy -- 3 Imperialism 3 Politics and government -- 3 Security, International 3 Civil rights -- 2 International cooperation 2 Islam 2 Military policy 2 National security -- 2 Nationalism 2 Political violence 2 Religious aspects -- 2 Anti-Americanism 1 Armed forces 1 Ballistic missile defenses 1 Case studies 1 Cold War -- 1 Foreign public opinion 1 Globalization -- 1 Government policy 1 Ideology 1 less ...