Terrorism -- 167 Terrorism 74 Prevention 51 War on Terrorism, 2001-2009 27 Prevention. -- 25 Islam 24 Religious aspects -- 23 more ... Government policy -- 21 Terrorists -- 20 Prevention -- 17 Psychological aspects 16 Foreign relations -- 15 National security -- 14 September 11 Terrorist Attacks, 2001 14 Terrorists 13 Government policy 12 Politics and government -- 11 Jihad 10 History 9 Psychology 9 Economic aspects 8 Islamic fundamentalism 8 History -- 7 International cooperation 6 Political aspects 6 Social aspects 6 Suicide bombings -- 6 World politics -- 6 Drug traffic 5 Finance 5 less ...