Smuggling of illegal drugs into the U.S. is a major problem. The 3 major drugs of foreign source cocaine, heroin, & marijuana are the products traded by a criminal enterprise whose sales total $50 billion annually. Federal efforts to stop or deter international narcotics trafficking have met with limited success. This report analyzes Fed. drug interdiction efforts & reports on future technological improvements. Describes technologies in use, & potentially available for countering smuggling by the various modes private vessels, private aircraft, land vehicles, commercial carriers, & through official ports of entry. Photos.