For 22 years, the International Association of Chiefs of Police (IACP) has partnered with the National Highway Traffic Safety Administration (NHTSA) and various state highway safety offices to provide one of the premier impaired driving training conferences in the world. The first IACP Annual Training Conference on Drugs, Alcohol, and Impaired Driving, held in Phoenix, Arizona, in 1993, attracted approximately 300 attendees. Last year’s conference, which was held in Denver, Colorado, attracted more than 1,000 attendees.