Terrorism -- Prevention 118 Terrorism 87 Prevention -- 76 Religious aspects -- 73 Islam 71 Government policy -- 53 more ... National security -- 46 Foreign relations -- 41 Terrorists -- 35 History -- 34 Politics and government -- 32 Prevention. -- 32 Psychological aspects 26 September 11 Terrorist Attacks, 2001 25 War on Terrorism, 2001-2009 24 History 22 Islam and politics -- 21 Jihad 21 War on terrorism, 2001- 20 Politics and government 18 Government policy 17 International cooperation 17 Islamic fundamentalism -- 16 Foreign relations 15 Islamic fundamentalism 15 Congresses 14 Political aspects 14 Psychology 14 Congresses -- 11 less ...