FDA boss threatens 'game over' for e-cigs if companies won't keep kids away

The head of the Food and Drug Administration has threatened to pull e-cigarettes out of U.S. markets entirely unless e-cig makers take greater measures to curb the youth's use of their products.  Speaking at a public hearing Friday, Scott Gottlieb, the FDA Commissioner, said he was "horrified" at the surge in rates of teen vaping, NBC reported. More than 3 million U.S. teens use e-cigarettes, an increase of 78 percent since 2011, according to recent CDC data. SEE ALSO: 5 Reasons to Ditch JUUL i...