Physical attacks on the power grid are also a big concern. In 2013, there was a sophisticated, multi-person attack on a large Bay Area electrical substation. Th

Physical attacks on the power grid are also a big concern. In 2013, there was a sophisticated, multi-person attack on a large Bay Area electrical substation. The attackers cut fibre optic cables and shot transformers, causing $15 million of damage. It's unknown who did this or why. https://en.wikipedia.org/wiki/Metcalf_sniper_attack https://en.wikipedia.org/wiki/Metcalf_sniper_attack