A bit of data.
Nuclear forensics.
Don’t know if people were aware of this or not, but a nuclear explosion leaves a fingerprint of neutron flux as well as residual dust materials. The source of the uranium (or more likely plutonium) can be determined by the nature of that material and its flux. Remember, the entirety of weapons material in an explosion is not consumed. Its residual is collectable. This was done particularly for the Chinese test explosions a few decades ago, with products shipped by them having residual dust.
The material source, processing and even movement can be determined. The only limit on this is the presumption that material over the decades has been stolen. So an explosion over Tel Aviv might show US plutonium.
That would be an interesting week.
And the Israeli program started with stolen American uranium, and France has sold fissile material in the Middle East. We buy uranium from Russia, good only knows where Pakistan got theirs. And after the fall of the USSr, they had massive amounts stored in bunkers with nothing but a padlock in some places. That nuclear fingerprint is getting closer to a ‘so what?’
Much more so that the 60s or 79s