Terrorism -- 149 Terrorism 88 Foreign relations -- 40 Prevention 35 War on terrorism, 2001- 31 Prevention -- 29 Religious aspects -- 22 more ... Islam 21 Government policy -- 20 History -- 20 National security -- 16 World politics -- 16 Politics and government -- 14 September 11 Terrorist Attacks, 2001 13 Terrorists -- 11 Military policy 9 Psychological aspects 9 Jihad 8 Political aspects 8 International cooperation 7 International relations 7 Islam and politics -- 7 Political aspects -- 7 Politics and government 7 Globalization 6 Islamic fundamentalism -- 6 Psychology 6 Radicalism -- 6 Security, International 6 Case studies 5 less ...