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Tech

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In a sophisticated cyber-attack, a hacker accessed the computer systems of the water treatment facility in a US city and modified drinking water chemical levels to dangerous parameters in an attempt to poison the city of nearly 15,000 residents. Sodium hydroxide, also known as lye, is the main ingredient in liquid drain cleaners, used to control water acidity and remove metals from drinking water in the water treatment plant. “The hacker changed the sodium hydroxide…