Terrorism -- Prevention 82 Terrorism 61 Prevention -- 50 Government policy -- 32 Islam 27 Religious aspects -- 27 more ... Prevention. -- 25 National security -- 23 History 18 Psychological aspects 18 Foreign relations -- 16 Terrorists -- 16 War on Terrorism, 2001-2009 16 Government policy 15 History -- 14 International cooperation 12 Politics and government -- 11 Politics and government 10 Psychology 10 Foreign relations 9 Political aspects 9 Security measures 8 September 11 Terrorist Attacks, 2001 8 Social aspects 8 War on terrorism, 2001- 8 Weapons of mass destruction 8 Case studies 7 Islamic fundamentalism -- 7 Jihad 7 less ...