Terrorism and Drug Trafficking: Threats and Roles of Explosives and Narcotics Detection Technology, Briefing Report to Congressional Requesters [open pdf - 180KB]
"The intelligence community believes that the threat of terrorism within the United States has increased. Unclassified reporting indicates changes in the pattern of terrorism. Although no specific aviation threat is known, experts believe that aviation is likely to remain an attractive target for terrorists. According to the Federal Bureau of Investigation (FBI), terrorist attacks could come from groups that are difficult to infiltrate and control. Information was uncovered in January 1995 about plans by such a group for multiple attacks on specific U. S. flights in Asia. Narcotics trafficking is a continuing concern. While cocaine has been the primary threat since 1985, heroin is becoming more of a threat. The intelligence community believes traffickers are presently most active on the Southwest border of the United States and use vehicles such as cars, trucks, and tractor-trailers carrying containers to smuggle narcotics. In 1994, the State Department reported that attacks by state-sponsored, secular terrorist groups declined, but attacks increased from radical fundamentalist groups, who operate more autonomously."
Government Accountability Office (GAO): http://www.gao.gov/