As ‘Vaping’ Rockets in Popularity, Will It Help Smokers Quit Tobacco, Hook Young Addicts or Mask Marijuana?

Southern California’s first electronic cigarette expo promised to be “epic.” And like any good party, it briefly got shut down by authorities.  How epic was it? So many thousands puffed away — or “vaped” — that the steamy haze set off fire alarms and forced the evacuation of the Anaheim Convention Center. Throngs of sellers…