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This is unnerving, but not necessarily scary, yet.
"On the scale of security threats, hackers scanning potential targets for vulnerabilities seems low. But when the hackers in question executed one of the most reckless cyberattacks in history, one that could have had easily turned destructive or even lethal, that reconnaissance has a more foreboding edge. Especially when the target of their scanning is the US power grid."
https://www.wired.com/story/triton-hackers-scan-us-power-grid/