Terrorists -- Terrorism -- 35 Psychology 12 Psychological aspects 10 Jihad 8 Prevention 8 Islam 7 more ... Religious aspects -- 7 Terrorism 6 Biography -- 5 Prevention. -- 5 Islamic fundamentalism 4 Muslims -- 4 Government policy -- 3 National security -- 3 Prevention -- 3 Case studies 2 Communism -- 2 Detention of persons -- 2 Executive power -- 2 Fiction 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 Soldiers -- 2 less ...