Nobody told the US how to do it or handed them a design. They did do a test, but it worked on the very first try. All Iran would have to do is do as well as America did and, despite what you think, knowledge of how to make it is readily available.
The hardest part are the extremely high tolerance detonators. They can test those in secret all day long. That’s where 75 years of progress in engineering makes the job a whole lot easier too. Modern electronics will also make it a lot easier for them to know when they get it right, without having to set off a nuke.
Nobody told the US how to do it or handed them a design. They did do a test, but it worked on the very first try. All Iran would have to do is do as well as America did and, despite what you think, knowledge of how to make it is readily available.
The hardest part are the extremely high tolerance detonators. They can test those in secret all day long. That’s where 75 years of progress in engineering makes the job a whole lot easier too. Modern electronics will also make it a lot easier for them to know when they get it right, without having to set off a nuke.