History Terrorism Prevention 12 Islam 9 Religious aspects 8 World politics 8 Foreign relations 6 Government policy 6 Islamic fundamentalism 6 Insurgency 4 Juvenile literature 4 Political aspects 4 September 11 Terrorist Attacks, 2001 4 Special operations (Military science) 4 20th century 3 Jihad 3 National security 3 Political violence 3 Politics and government 3 Sources 3 Special forces (Military science) 3 United States 3 Atrocities 2 Bibliography 2 Chronology 2 Communism 2 Congresses 2 Guerrilla warfare 2 Influence 2 Intelligence service 2