The U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives, or ATF, says a cyberattack on one of its systems has been declared a “major incident,” a formal, legally defined classification that prompts a formal notification to lawmakers in Congress. ATF said in a statement that it’s responding to the cyberattack on a standalone system that’s separate from the bureau’s network. An ATF spokesperson told reporters that the targeted computer system contained informati…
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