Why is there “no possibility of an agreement” if Iran isn’t making nuclear weapons? If you agree that you’re not doing something, then let the inspectors in to verify that and be on your merry sanctionless way. That’s what common sense tells me.
Of course Iran has a nuclear weapons program. Burns’ statement is misunderstood or misrepresented. Iran is not assembling nuclear weapons (so far). To do so would cross the line, and the mullahs’ hideouts would be turned into rubble. Nothing going on Iran isn’t known to Israel.