Terrorism -- Prevention. -- 28 Prevention -- 13 National security -- 12 Government policy -- 8 Civil defense -- 5 War on Terrorism, 2001-2009 5 more ... Civil rights -- 4 Islam 4 Religious aspects -- 4 Terrorists -- 4 Evaluation. -- 3 Intelligence service -- 3 Politics and government -- 3 Prevention 3 Security measures 3 Aeronautics, Commercial -- 2 Emergency management -- 2 Foreign relations -- 2 Internal security -- 2 Islamic fundamentalism -- 2 Law enforcement -- 2 Military policy 2 Psychological aspects 2 Terrorism 2 Weapons of mass destruction 2 Air power -- 1 Asymmetric warfare -- 1 Business -- 1 Business enterprises -- 1 less ...