Smoke billowed through the house as Susan ran outside, shouting for help. Their elder daughter, alerted by her mother’s cries, also sought assistance. The blast came from a pipe bomb crafted by the Unabomber.Essex County Sheriff Armando Fontoura summoned the ATF, who sifted through the kitchen debris and identified parts consistent with the Unabomber’s previous devices. As always, the bomber used everyday items like nails, crafting handmade switches and polished wooden components. The 9½-by-7¼-by-2¼-inch white cardboard box was reinforced internally with additional cardboard and housed a handmade wooden container. Inside lay an aluminum pipe, no longer than 9½ inches, sealed with metal end plugs secured by two locking pins. The pipe contained an explosive blend of sodium chlorate and aluminum, triggered by four nine-volt batteries, a custom initiator, and a wooden-metal anti-open switch—the Unabomber’s hallmark. To heighten the device’s lethality, he included one-inch green paneling nails and double-edged razor blades.

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