Terrorists -- Terrorism -- 31 Psychology 10 Psychological aspects 9 Prevention 8 Jihad 7 Islam 6 more ... Religious aspects -- 6 Terrorism 6 Prevention. -- 5 Islamic fundamentalism 4 Government policy -- 3 Muslims -- 3 National security -- 3 Prevention -- 3 Detention of persons -- 2 Executive power -- 2 History -- 2 Islamic fundamentalism -- 2 Legal status, laws, etc -- 2 Lockerbi -- 2 Political aspects 2 Politics and government -- 2 Social conflict -- 2 Social networks 2 War and emergency powers -- 2 War on Terrorism, 2001-2009 2 Accidents 1 Aeronautics 1 Aeronautics -- 1 less ...