Arizona court rules on DUI law for marijuana users

Authorities can't prosecute Arizona motorists for driving under the influence of marijuana unless the person is impaired at the time of the stop, the state Supreme Court ruled Tuesday in the latest opinion on an issue that several states have grappled with across the nation.

E-cigarette industry awaits looming federal regulation

Smokers are increasingly turning to battery-powered electronic cigarettes to get their nicotine fix. They're about to find out what federal regulators have to say about the popular devices. The Food and Drug Administration will propose rules for e-cigarettes as early as this month.