[DustyMoment]

As most Japanese buildings were wood and paper at that time,

Good mythology, but not true. At the Peace Park Museum, there are literally dozens of fragments of concrete that have images of people burned onto them.

[American in Israel]

True, but I suspect modern buildings are far more resistant to this kind of thing than Japanese buildings were then.

But, if you are a kilometer from a 1 megaton, I dont care if you live in a steel ball, you are toast anyway. I just suspect the damage radius will be smaller.

Kinda a moot point. Nukes will fry the world economy from 10,000 miles away. One thing about terrorists, the economy is their prime target. If they cannot build it, they want to destroy it.

It's a bully in a sandbox mentality.