By Mark Stone, US correspondent
Two things can be true at the same time.
It's possible that the American airstrikes did "obliterate" the Iranian nuclear sites hit on Saturday night.
It's also possible that Iran retains stockpiles of enriched uranium and nuclear production equipment elsewhere - undisclosed.
We know from the International Atomic Energy Agency that Iran has been obstructive, and we know too that the regime has attempted to build new facilities.
This pattern of behaviour makes it possible, even probable, that they have existing hidden programmes.
Preliminary intelligence reports shared with European governments indicated that Iran's highly-enriched uranium stockpile remains largely intact and that much of it was not concentrated in the Fordow site.
Given all this, the storm around the level of destruction caused by Saturday's American airstrikes could be a distraction. Nevertheless, the early morning Pentagon news conference revealed plenty.
There were two strands to the briefing. From the politician, we got a political attack, and from the general, we got the military detail.