US state agents have today admitted that in 2022 they stockpiled enough fentanyl to kill every man, woman, child and gender-non-specific-individual in the USA:
http://www.bbc.co.uk/news/world-us-canada-64047688
Fentanyl has no smell or taste and can be added to domestic water supplies fairly easily.
Given the US Government's previous fatal use of unaware civilians as medical guinea pigs (e.g. Tuskegee) and its proven willingness to execute citizens that displease it without trial (e.g. black Americans or Muslims), how worried should US residents be about this admission?