Recently declassified government documents have shed new light on the decades-old debate over the fluoridation of drinking water, and have added to a growing body of scientific evidence concerning the health effects of fluoride. Much of the original evidence about fluoride, which suggested it was safe for human consumption in low doses, was actually generated by “Manhattan Project” scientists in the 1940s. As it turns out, these officials were ordered by government powers to provide information that would be “useful in litigation” and that would obfuscate its improper handling and disposal.
https://www.projectcensored.org/18-manhattan-project-covered-up-effects-of-fluoride-toxicity/