The details of the Manhattan Project were so secret that >100,000 workers had no idea why they did their jobs. A laundrywoman told she had to "listen for an instrument's clicking noise", actually a Geiger counter testing the radiation levels of uniforms: buff.ly/3Czm2kC (https://buff.ly/3Czm2kC)

https://nitter.moomoo.me/Rainmaker1973/status/1648409083752357891#m