Have chemical attacks conducted in the past by such groups as the Japanese terro

Have chemical attacks conducted in the past by such groups as the Japanese terrorist group Aum Shinrikyo or the Syrian government in the past half-decade had a significant effect on counterterrorism preparedness against chemical weapons domestically in the United States? Why or Why not? Do you feel the more recent chemical attacks by the Russian government against their former spy in the UK and political opponents will have an impact on chemical weapon preparedness here in the United States? Why or why not?