[GeorgefromGeorgia]

With Iran's air defense you need stealth aircraft (USA). Also, F-15's can deliver bunker busters, but you would need a lot of them. Israel would need to provide tactical air protection for the bombers.
I think it will be the US, not Israel.

[Rocky Mountain High]

Or US aircraft painted to look like IAF. Of course, in today's world that would stay secret for all of about 10 minutes.