"Biological Warfare United States." . . "Terrorism United States." . . "Civil Defense United States." . . "Estados Unidos" . . "Armas químicas." . . "Guerre biologique." . . "EE. UU." . . "Armas biológicas." . . "Terrorismo." . . . . "United States" . . "Guerra biológica." . . "Défense États-Unis." . . "Chemical Warfare United States." . . "Guerre chimique." . . . . . . . . . . "America the vulnerable : the threat of chemical and biological warfare" . . . . . . . . . . . . . . . . . . "America the vulnerable the threat of chemical and biological warfare"@en . "America the vulnerable the threat of chemical and biological warfare" . . . . . . .