> the United States and others are pretty easily able to identify where enriched material comes from

Maybe, if you let them inspect the material…

Well that's a big IF. Iran wasn't allowing inspections, also we shouldn't need a special deal with Iran or else they build nuclear bombs and try to kill people.

But what I meant was that if a weapon was used we'd be able to identify the signature of the material used and pinpoint the exact location on earth that it came from. In other words, if Russia "easily" (again that's an another feather in the cap agains the JCPOA) sent material to Iran and they used it and built a bomb and used it we'd know it came from a Russian mine. Of course they could maybe steal material from somewhere else and then Russia could transport that but hey, look where we're at. We've got Russia who invaded Ukraine supplying nuclear material to Iran to build a bomb. Maybe we shouldn't be on team Russia/Iran yea?