Terrorism -- Prevention 96 Terrorism 70 Prevention -- 67 Religious aspects -- 67 Islam 66 Government policy -- 50 more ... National security -- 39 Prevention. -- 32 Politics and government -- 30 Foreign relations -- 28 Terrorists -- 27 History -- 25 War on Terrorism, 2001-2009 24 Islam and politics -- 20 History 19 Jihad 19 Psychological aspects 19 September 11 Terrorist Attacks, 2001 17 Government policy 16 International cooperation 15 Islamic fundamentalism -- 15 Political aspects 14 Foreign relations 13 Islamic fundamentalism 13 War on terrorism, 2001- 13 Congresses 12 Politics and government 12 War -- 11 Psychology 10 less ...