Terrorism Terrorism -- 68 Prevention 28 World politics -- 13 Prevention -- 10 Security, International 10 Terrorists 8 more ... Political violence 7 War on terrorism, 2001- 7 Weapons of mass destruction 7 Forecasting 6 International relations 6 Terrorists -- 6 War on Terrorism, 2001-2009 6 Foreign relations -- 5 History 5 History -- 5 Foreign relations 4 Globalization 4 International cooperation 4 Islam 4 Radicalism 4 Religious aspects -- 4 September 11 Terrorist Attacks, 2001 4 Government policy -- 3 Guerrilla warfare 3 Moral and ethical aspects 3 National security -- 3 Psychological aspects 3 Social conflict 3 less ...