Synthetic drugs 1,450 times more potent than heroin are flooding American jails and streets faster than authorities can respond. International investigative correspondent Azam Ahmed reveals how chemists are engineering deadlier substances that render traditional drug enforcement obsolete, trapping incarcerated people in addiction while a single dealer can saturate facilities through paper-soaked smuggling networks. There are now 1,450 new psychoactive substances in circulation, triple the number from a decade ago, each synthesized in labs and easily modified into new drugs like nitazines—20 to 40 times more potent than fentanyl.