Important developments occurred in 1990 including a halt in the rise of coca cultivation and opium production. Significantly, several key countries improved their counter-narcotics and law enforcement performance. In the critical countries of Colombia, Bolivia, and Mexico, governments expanded their cooperative efforts with the U.S. government resulting in increased harassment and disruption of cocaine trafficking organizations and a consequent reduction in their ability to conduct business. Seizures of illegal drugs and arrests of traffickers increased worldwide. More international attention was devoted to money laundering and precursor chemical control. The challenge for 1991 is for the principal narcotics producing and transit countries, in cooperation with the U.S. government, to sustain the political will and determination which made the gains realized in 1990 possible. The report includes country summaries, a fiscal summary for 1992, and identification of the legislative basis for the International Narcotics Control Strategy Report. 4 tables and 1 graph