The message broadcast in several states last winter was equal parts alarming and absurd: “Civil authorities in your area have reported that the bodies of the dead are rising from their graves and attacking the living. . . . Do not attempt to approach or apprehend these bodies, as they are considered extremely dangerous.”
The reported zombie invasion was not something out of the “The Walking Dead.” It was the federal Emergency Alert System under control of hackers — who exploited weaknesses that are disturbingly common in many critical systems throughout government, according to a Senate cybersecurity report set for release Tuesday.
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