Terrorism -- Prevention 83 Terrorism 62 Prevention -- 36 Islam 26 Religious aspects -- 26 Prevention. -- 23 more ... Psychological aspects 23 Terrorists -- 22 Government policy -- 20 History 19 National security -- 16 War on Terrorism, 2001-2009 16 Foreign relations -- 14 History -- 12 Psychology 12 Government policy 11 Politics and government -- 10 September 11 Terrorist Attacks, 2001 10 Social aspects 10 International cooperation 9 Islamic fundamentalism -- 8 Jihad 8 Politics and government 8 Security measures 8 Economic aspects 7 Religious aspects 7 War on terrorism, 2001- 7 Forecasting 6 Political aspects 6 less ...