] Casting doubt on a basic principle of U.S. anti-drug
] policies, an independent study concluded on Monday that
] marijuana use does not lead teenagers to experiment with
] hard drugs like heroin or cocaine.
]
] The study by the private, nonprofit RAND Drug Policy
] Research Center countered the theory that marijuana acts
] as a so-called gateway drug to more harmful narcotics, a
] key argument against legalizing pot in the United States.

Study: Marijuana May Not Lead to Hard Drugs