Terrorism -- 257 Terrorism 97 Prevention 77 Politics and government -- 71 Islam 68 History -- 61 Religious aspects -- 58 more ... Politics and government 53 Foreign relations -- 49 History 48 Islam -- 44 Islam and politics -- 44 War on Terrorism, 2001-2009 41 National security -- 38 Prevention. -- 33 Terrorists -- 30 World politics -- 30 Government policy -- 28 Prevention -- 28 Security, International 27 Jihad 26 Islamic fundamentalism 24 Foreign relations 22 September 11 Terrorist Attacks, 2001 20 Muslims -- 19 Psychological aspects 19 International relations 18 Military policy 18 Islamic fundamentalism -- 17 History. -- 16 less ...