Could be way, way off target; but just for future reference...
http://justice.gov/ndic/pubs3/3690/heroin.htm
"The Durham Police Department, in response to the NDIC National Drug Threat Survey 2001, reports that heroin is widely available"
"Law enforcement officers in Durham report that retail quantities of heroin are frequently sold from several local businesses including small independent recording studios that may be fronts for distributing heroin."
http://www.hri.org/docs/USSD-INCSR/96/Executive/Heroin.html
"Nigeria is critical to the heroin trade. Nigeria is Africa's most significant transshipment point. But Nigerians also surface as the heroin traffickers par excellence on every continent. Though they are among the principal smugglers of Southeast Asian heroin into the United States, Nigerians are regularly arrested in Bangkok, Rio de Janeiro, New York, Moscow, Riyadh, Bombay, etc. Unfortunately, rampant corruption at all levels of government in Nigeria virtually assures Nigerian trafficking organizations a favored place in the heroin trade."