Terrorism -- National security -- 2 Prevention. -- 2 Civil defense -- 1 Foreign relations -- 1 Government policy -- 1 International relations 1 more ... Law enforcement -- 1 National security 1 Political stability 1 Responses -- 1 Security strategy 1 Security, International 1 Terrorism 1 Terrorists -- 1 War on terrorism, 2001- 1 Weapons of mass destruction 1 less ...