Russia, the United States and China have all built new facilities and dug new tunnels at their nuclear test sites in recent years, satellite images obtained exclusively by CNN show, at a time when tensions between the three major nuclear powers have risen to their highest in decades.
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Probably, if you read the whole thing it says the us has been continually expanding theirs since 2018, you can’t really be too surprised that all the other major powers would too.
Well probably. After all the permanent members of the UN security council released a joint statement that nuclear war would be bad (sic) roughly two month before the invasion of Ukraine began. With the clarity of hindsight it looks a lot like everybody knew what was going to happen and they wanted to reassure each other.