Prevention -- Terrorism -- 13 National security -- 4 Civil rights -- 3 Prevention 2 Weapons of mass destruction 2 Asymmetric warfare -- 1 more ... Civil defense -- 1 Crisis management 1 Defenses 1 Disasters -- 1 Emergency communication system -- 1 Emergency management -- 1 Government policy -- 1 Hostages 1 Intelligence officers -- 1 Internal security -- 1 International cooperation 1 Islam 1 Islamic fundamentalism -- 1 Law and legislation -- 1 Law enforcement -- 1 Military policy 1 Prevention. -- 1 Psychological aspects 1 Religious aspects -- 1 September 11 Terrorist Attacks, 2001 -- 1 Terrorism 1 Undercover operations -- 1 White House 1 less ...