I think you mean in the sense of unsolved mysteries?

The Metcalf attack was most likely done by CWA union employees, who were in a labor dispute with AT&T at the time. Two fiber vaults had AT&T fibers cut, and the Metcalf station was the primary source of power for the SNJSCA02 central office.

Two years later DHS indicated during an energy conference they had not identified the exact attacker but believed it was an insider. https://money.cnn.com/2015/10/16/technology/sniper-power-gri...

There is nothing better about that? destruction of property causing hundreds of millions of dollars in damage is not hacking. Destroying stuff with guns is not hacking. - electrical engineer that has to organize shutdowns to replace insulators on transmission lines that are damaged from people shooting them

In what way is that "better"? People can go shoot things, big whoop.

A mystery incident of course.

Hm, I feel like that there is no challenge to "how did they do that" hurts in that regard.