Washington — The Food and Drug Administration on Tuesday announced its first authorization of fruit-flavored electronic cigarettes intended for adult smokers, a major policy shift that comes after months of appeals to President Trump from the vaping industry.The decision is certain to be opposed by health groups and parent organizations that have long pointed to flavors as the driver behind underage vaping in the U.S. But the federal action comes as teen vaping rates have dropped to a 10-year low and manufacturers have pushed the Republican administration to loosen restrictions on their products. Vaping companies have long made the case...