Three quarters of all heroin brought into the United States comes from South America and Mexico (with South America making up the majority of this amount) Internationally, heroin is controlled under Schedules I and IV of the Single Convention on Narcotic Drugs. During World War II chocolates dosed with methamphetamine were known as Fliegerschokolade ("flyer's chocolate") when given to pilots, or Panzerschokolade ("tanker's chocolate") when given to tank crews. In general, most heroin comes from opium poppy farms in SW Asia (the “Golden Crescent,” primarily Afghanistan and Pakistan), SE Asia (the “Golden Triangle,” primarily in Myanmar), and Latin American (primarily Colombia). Heroin trafficking is heavy worldwide. According to U.N. sponsored survey, as of 2004, Afghanistan accounted for production of 87 percent of the world's heroin. | 
