'There are lots of lurid tales about the Wa, who once made a practice of beheading intruders. But the book’s bigger story involves America’s hapless war on drugs. Winn spent several years interviewing Wa citizens, U.S. Drug Enforcement Agency lifers and CIA spies. He learned that Wa-produced heroin found its way to American soldiers in Vietnam, and in the years that followed, CIA-linked opportunists helped the Wa become a force in Southeast Asia’s meth trade.'