Don't panic NYC, it's non-toxic gas

Why does this cause so much unease within me?

Non-Toxic Gas to Be Deployed in 100 NYC Locations, Including Transit, In Bio-Attack Readiness Test

https://www.nbcnewyork.com/news/local/homeland-security-deploying-non-toxic-gas-in-nyc-trains-next-week-for-terror-readiness-study/3316701/?_osource=SocialFlowFB_NYBrand&fbclid=IwAR14SrhBxC-TA0TmSUU0dztMqE2xyW68a1JPFzTIwpAFyD7K4gdoZHY6UOA

New York City’s response plans for a chemical or biological attack will be put to the test in the coming weeks as part of a federal preparedness study. The MTA says the Department of Homeland Security working alongside a team of researchers and city agencies will deploy a non-toxic gas this month at about 120 locations across the city, including…