[mattm]

Nuclear or chemical fallout that drifts into NATO countries could potentially warrant a response.

Here's one such article from a few weeks ago. https://www.military.com/daily-news/2022/03/23/if-russia-use...

Of course, we won't know for sure unless it happens (and let's hope it doesn't).

[hollerith]

OK, but even when detonated high enough above the ground that no appreciable fallout is produced, nukes are quite destructive. In fact, for many kinds of targets, cities being one, the altitude that maximizes destruction is high enough.