Terrorists -- Terrorism -- 21 Psychology 8 Psychological aspects 7 Jihad 6 Prevention 6 Islam 5 more ... Religious aspects -- 5 Prevention. -- 4 Terrorism 4 Islamic fundamentalism 3 Muslims -- 3 Detention of persons -- 2 Executive power -- 2 Legal status, laws, etc -- 2 Political aspects 2 Politics and government -- 2 War and emergency powers -- 2 War on Terrorism, 2001-2009 2 Athletes -- 1 Biological warfare -- 1 Case studies 1 Case studies. -- 1 Chemical warfare -- 1 Civil rights -- 1 Combatants and noncombatants (International Law) 1 Communism -- 1 Computer network resources 1 Counterinsurgency -- 1 Government policy -- 1 less ...