A couple of Stanford engineers who had been cursed with smoking habits invented what is now the most popular smoking-cessation tool on the market — and the FDA has just declared war on it, because it looks trashy. The FDA has ordered five big players in the vaping business — JUUL, Vuse, MarkTen, blu, and Logic — to submit plans for keeping their products out of the hands of minors, giving them 60 days to do so — and threatening to take their products off the market if Washington is not satisfied.