As a nuclear war expert, Mr. Sagan should be aware that the Biden administration did not take the opportunity to get Iran back to not pursuing nukes, because that would have meant holding up the Amerikan end of the deal and ending or at least easing sanctions on them. That's why Trump broke the treaty in the first place, because Iran complying was supposed to be rewarded with a lifting of US sanctions and Trump didn't want that. And Biden didn't want that, either, and instead chose to further drive home the point that you cannot trust any agreement with the US. And these people are wondering why their empire is in decay. They think they can brute force their way through anything, and it will be their downfall.