Politics and government -- Appropriations and expenditures 2 Defenses 2 Defenses -- 2 Economic aspects 2 National security -- 2 Civil defense 1 more ... Civil defense -- 1 Harbors -- 1 Merchant marine -- 1 National security 1 Prevention 1 Security measures 1 Security measures -- 1 Terrorism -- 1 War on Terrorism, 2001-2009 1 less ...