Foreign hackers breached a US nuclear weapons plant via SharePoint flaws

Whoever puts a nuclear fission facility on the internet should be put behind bars.

It is not a nuclear fission facility, it is "a plant that produces the vast majority of critical non-nuclear components for US nuclear weapons".

The also targeted the IT side, not the operational side, which, according to the article is likely to be airgapped. Even sensitive production facilities need some internet access, people work there and like everyone else, they need food, office supplies, toilet paper, etc... they can't be cut off the rest of the world completely.