The US is leaving behind a flourishing, violent trade in heroin and crystal meth in Afghanistan. HERAT, Afghanistan — For weeks, Afghan police had been staking out a single-family house they believed was being used as a meth lab. Afghanistan's drug trade generates an estimated $35 million a month for the Taliban and drug gangs. A mysterious grassIn 2017, rumors circulated in western Afghanistan that a mysterious form of grass had been found to contain the key ingredient in crystal meth. "So long as this war continues, the drug trade will continue to grow bigger and bigger.

---