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Drug Enforcement Administration ranks controlled substances according to five "schedules." Marijuana, along with drugs like heroin and LSD, is a Schedule I drug, meaning it is considered to have the highest potential for abuse and be the "most dangerous." More from NBCNews.com: Alaska Becomes Third State to Legalize Marijuana Washington Has More Pot Than It Can Smoke Pot Vending Machines Dispense Weed Because alcohol and tobacco are legal, they are not controlled substances, and not subject to DEA scheduling

Having regular health check-ups is one the best ways to stay aware about your health

A: The case is not designed for slim or long cigarettes

The cigarettes, he concluded after a few puffs, "were a part of the punishment." Over the years, Johnson became attuned to subtle and major shifts in cigarette advertising and packaging design