Terrorism -- 256 Terrorism 100 Prevention 73 Islam 46 Religious aspects -- 43 War on Terrorism, 2001-2009 42 Prevention. -- 31 more ... Prevention -- 29 Foreign relations -- 27 Government policy -- 25 Terrorists -- 24 Politics and government -- 23 National security -- 21 Psychological aspects 19 September 11 Terrorist Attacks, 2001 17 History 15 History -- 15 Islamic fundamentalism 14 Jihad 14 World politics -- 14 Islam and politics -- 13 Psychology 11 Government policy 10 Islamic fundamentalism -- 10 Security measures 10 Terrorists 10 International cooperation 9 September 11 Terrorist Attacks, 2001 -- 9 Social aspects 9 War on terrorism, 2001- 9 less ...