20thcentury 21stcentury analytic appropriationsandexpenditures biologicalarmscontrol biologicalwarfare biologicalweapons biosecurity bioterrorism chemicalwarfare chemicalwarfare(internationallaw) chemicalwarfareagents chemicalweapons chemicalweaponsdisposal chemistry congresses control decontamination defensemeasures disarmament economicsanctions finance foreignrelations governmentpolicy governmentregulation history humanrights interagencycoordination internationalcooperation iraq methods nucleararmscontrol nucleardisarmament nuclearnonproliferation nuclearweapons politics politicsandgovernment prevention qv663c517851998 russia(federation) terrorism ug447s755h2010 unitedstates verification weaponsofmassdestruction