Either a live test or a publicity stunt is probably all that is needed for Israel to justify a strike that they have been preparing for over the past year.
Our intel must see something in the cooker given the additional abm assets forwarded to the region.
Our intel must see something in the cooker given the additional abm assets forwarded to the region.
...
Ah, but a “demo” of a nuclear test (that Israel drops a nuke in from their newly-moved ship (which eliminates the Iraq-Jordan overflight issue)) would be hard to distinguish between the Israel strike and the Iran test, wouldn't it? Except the Israel “test” would explode over top the Iranian test lab, not the test site.)
On the other hand, YES - our intel agencies would have the knowledge.
But the White House and Pentagon would (deliberately_) ignore that intelligence anyway. They have been bred to hate Israel even more than they hate the US military and capitalism.