21.   Vietnam is struggling to wipe out its own crops of poppies used to make heroin, and many Vietnamese fear a rising rate of drug addiction.

22.   Indian smugglers barter for those goods with wine, chemicals -- particularly acetic anhydride which is used to make heroin -- spices, betel leaf and cattle.

23.   Colombia is the source of most of the cocaine sold on US streets as well as marijuana and opium poppy from which heroin is made.