[dgroshev]

Tsar Bomba was a one off and has no relation to weapons of today. Look up what's on top of Tridents, it's mostly W-76 of various kinds, all below 100kt, which is about twice more powerful than Fat Man when you consider that effects scale very sublinearly vs yield.

There is practically no fallout from air bursts.

Nuclear warhead is a late WW2 strategic bombing raid in a 100kg package, delivered in a fraction of a second, and with no protection against it.