Marijuana users still barred from buying guns even in states where pot is legal, ATF warns

Users of marijuana remain barred from purchasing and possessing guns under a decades-old federal law, even as more and more states move to legalize recreational use of the drug, federal authorities warned this week. Unless marijuana is legalized on a federal level, users of cannabis will continue to be prohibited from shipping, transporting, receiving or possessing firearms and ammunition, the Bureau of Alcohol, Tobacco, Firearms and Explosives, or ATF, said in a notice. The ATF, which oversees federal gun regulations, issued the reminder Tuesday in response to a measure signed...