Terrorism -- 172 Terrorism 77 Prevention 63 Politics and government -- 29 Prevention -- 26 Prevention. -- 25 Foreign relations -- 24 more ... Islam 24 National security -- 24 Politics and government 24 Religious aspects -- 24 History 23 Security, International 23 War on Terrorism, 2001-2009 21 World politics -- 21 History -- 19 Terrorists -- 18 International relations 17 Islam and politics -- 16 Jihad 15 Psychological aspects 15 Government policy -- 14 Islam -- 13 Economic aspects 11 Foreign relations 11 Government policy 11 International cooperation 11 Islam and politics 11 Military policy 11 September 11 Terrorist Attacks, 2001 11 less ...