@hacks4pancakes Yup. Some years ago, after a cascading failure blacked out a good chunk of the US, several people asked me if "hackers" had done it. My response was that power grid dynamics were so complex that there was no way attackers could predict what would happen. Sure enough, the eventual investigation showed that a series of improbable events had coincided; that plus the cascade effect did it. To quote myself, "complex systems fail in complex ways".