Terrorism Terrorism -- 87 Prevention 35 World politics -- 18 Prevention -- 16 Security, International 13 Foreign relations -- 12 more ... Terrorists 11 International relations 10 Political violence 10 Weapons of mass destruction 9 War on terrorism, 2001- 8 Forecasting 7 History 7 Islam 7 History -- 6 International cooperation 6 Religious aspects -- 6 September 11 Terrorist Attacks, 2001 6 Terrorists -- 6 War on Terrorism, 2001-2009 6 Foreign relations 5 Globalization 5 Government policy -- 5 Insurgency 5 Radicalism 5 Government policy 4 International law 4 Jihad 4 National security -- 4 less ...