Terrorism -- 528 Terrorism 260 Prevention 116 Foreign relations -- 79 Prevention -- 77 Islam 74 Religious aspects -- 73 more ... Government policy -- 53 National security -- 53 War on terrorism, 2001- 50 History -- 43 War on Terrorism, 2001-2009 42 Politics and government -- 40 Terrorists -- 37 Prevention. -- 34 September 11 Terrorist Attacks, 2001 34 World politics -- 32 Psychological aspects 26 Islam and politics -- 22 Jihad 22 History 21 Political aspects 20 Politics and government 19 International cooperation 18 International relations 18 Islamic fundamentalism -- 18 Military policy 18 Security, International 18 Government policy 17 Political aspects -- 17 less ...