"The moral opposition to chemical and biological weapons has much to do with their indiscriminate nature and the consequential risk of collateral harm. In 1968, wind blew a cloud of VX nerve agent from the Dugway Proving Grounds in Utah into a nearby farm, killing thousands of sheep. Public opposition to the event helped catalyze the Nixon administration’s review of the U.S. chemical and biological weapons programs, culminating in an end to the bioweapons program. With improved targeting, including employing drone-based environmental sensors, it’s possible to imagine less error-prone, more discriminate chemical and biological weapon delivery systems that might be less morally objectionable."
https://warontherocks.com/2019/02/drones-of-mass-destruction-drone-swarms-and-the-future-of-nuclear-chemical-and-biological-weapons/
https://warontherocks.com/2019/02/drones-of-mass-destruction-drone-swarms-and-the-future-of-nuclear-chemical-and-biological-weapons/