The first priority of the strategy is to reduce illicit drug use; this goal represents the ultimate objective of all supply reduction and demand reduction programs. Effective drug prevention programs, effective drug treatment, enhanced international determination to address the drug problem, successes in dealing with the drug trafficking leadership, and tightly focused community-based programs have all contributed to overall progress in achieving the Strategy goals. New challenges that could hinder continued progress include increasing adolescent drug use and increasing use of heroin and other drugs. Tables and notes