Drug Factory This seemingly innocuous villa near Marseilles, France, was found to house a heroin processing laboratory. AP reporter Bernard Gavzer stands at a sealed entrance to the house - the undercover agents involved in the case were not willing to be photographed. The most expert processers in the world operate round Marseilles, and agents of the U.S. Bureau of Narcotics and Dangerous Drugs are trying to clamp down on drug trafficking at this processing stage, before the heroin gets sent on its way - to the U.S.