>>4044563 lb
In the reality that I grew up in
They did not need to use mirrors until the hydrogen fusion bomb was developed
The Hiroshima and Nagasaki bombs were a simpler design in which a plug of material
Was injected into a cavity in a larger almost spherical material,
By a small explosion.
But in my reality, radioactive material was far more powerful
And didn't need mirrors to concentrate the energy.
In this reality now, I think we have a weaker kind of radioactivity
That is safer to use
And that is why tactical devices appear to be more common
And why people do not fear the radioactivity of a nuclear war so strongly.
Mandela effect is working out well for us.