In The Know: Tobacco, Alcohol and Marijuana makes clear how terribly dangerous tobacco, alcohol, and marijuana really are. By exploring each of the "Gateway Drugs," the harmful effects on the mind and body are exposed. The video is narrated by four young adults and includes interviews with medical experts who underscore the frightening facts about the damage these drugs cause. The video concludes with the dramatic story of a survivor of a drunk driver, Dawn Brown, and a mother and her unborn child, who were not as lucky. It's a moving addition to any drug abuse prevention program.