Terrorism -- Prevention 96 Terrorism 74 Prevention -- 56 Government policy -- 35 Islam 31 Religious aspects -- 31 more ... National security -- 26 Prevention. -- 25 Psychological aspects 25 Terrorists -- 24 Foreign relations -- 22 History -- 20 History 19 Government policy 16 War on Terrorism, 2001-2009 15 Psychology 14 International cooperation 13 War on terrorism, 2001- 13 Politics and government -- 11 September 11 Terrorist Attacks, 2001 11 Social aspects 10 Foreign relations 9 Islamic fundamentalism -- 8 Jihad 8 Political aspects 8 Politics and government 8 Radicalism -- 8 Security measures 8 Weapons of mass destruction 8 less ...