Terrorism -- 541 Terrorism 281 Prevention 125 Foreign relations -- 98 Islam 82 Religious aspects -- 79 Prevention -- 78 more ... National security -- 66 Politics and government -- 56 Government policy -- 54 War on terrorism, 2001- 50 History -- 44 War on Terrorism, 2001-2009 43 Terrorists -- 40 September 11 Terrorist Attacks, 2001 37 World politics -- 36 Prevention. -- 35 Jihad 29 History 26 International relations 26 Psychological aspects 26 Military policy 25 Politics and government 25 Security, International 25 Islam and politics -- 23 Political aspects 23 Islamic fundamentalism 22 International cooperation 21 Foreign relations 19 Islamic fundamentalism -- 19 less ...