The CIA has reported multiple times in intelligence reports that they did not appear to be developing a nuclear weapon. Is the CIA lying?
It is true they do have equipment that COULD be used to POTENTIALLY develop weopons grade material. However, that same equipment is NEEDED to devolop nuclear power plants.
We had a pretty reasonable deal in place, of which, they were apparently holding up their end. Was the deal perfect? No, but it was certainly reasonable.