New York City won a significant victory this week in its civil suit against the firearms industry, winning the right to information that could help prove its claim that the industry closes its eyes to the way guns get into the hands of criminals. On Wednesday, a federal magistrate ruled that the city was entitled to federal data that traces the path of guns used in crimes, overruling objections by the Justice Department. Lawyers say that without the data the city would have difficulty proving its claim that the gun industry's marketing and distribution practices amount to a public nuisance....