Terrorism -- 256 Terrorism 100 Prevention 75 Islam 48 Religious aspects -- 44 War on Terrorism, 2001-2009 42 Prevention. -- 32 more ... Foreign relations -- 29 Prevention -- 29 Politics and government -- 27 Terrorists -- 26 Government policy -- 25 National security -- 23 Psychological aspects 19 September 11 Terrorist Attacks, 2001 18 Islamic fundamentalism 17 World politics -- 17 History 16 History -- 15 Jihad 15 Islam and politics -- 13 Psychology 11 Security measures 11 Security, International 11 Terrorists 11 Government policy 10 International cooperation 10 Islamic fundamentalism -- 10 September 11 Terrorist Attacks, 2001 -- 10 Weapons of mass destruction 10 less ...