In this Friday, March 21, 2014 photo, students at Tinley Park High School in Tinley Park, Ill. listen as Cody Lewis talks about his addiction to heroin and the tremendous problems it causes for him and his family. At age 12, Lewis started using marijuana. By freshman year, he was smoking weed daily at home - hiding his stash in a bedroom vent - or outside school in Batavia, a far western Chicago suburb. "It would bring my mood up," he says. "I felt ... like a normal teenager." (AP Photo/Charles Rex Arbogast)
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