Supreme Court Sides With Truck Driver Fired Over Drug Test

The driver, Douglas Horn, sued the maker of a product advertised as THC-free under a federal racketeering law, saying he had suffered a business injury.

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As Marijuana Use Grows, Effect on Road Safety Remains a Blind Spot

Scientists want to create breathalyzers that show how recently a driver used marijuana. Researchers also are studying how cannabis impairs motor skills and reflexes for habitual and occasional users.

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