You may also be recalling the gas chambers of the Holocaust. However, that kind of chemical warfare is usually short-lived and then quashed by some powerful nation or combination of rich, elite politicians who simply won't tolerate losing control of their loyal people – the same citizens who believe their leaders are always taking action in their own country's "best interest." These gullible folks are called "sheeple," and they themselves are controlled by a whole different kind of chemical warfare, that's much more effective for long-term mind control. Americans who fall under this chemically-induced "spell" rarely ever wake up from it – they remain zombie-like tax payers for life, who vote for more punishment, fewer rights, and lots of "free stuff" (that they may never even get).