How do we know if US strikes on Iran's nuclear facilities were successful? by Brookings institute
https://yewtu.be/watch?v=G3IlKgj3Rn4
https://youtube.com/watch?v=G3IlKgj3Rn4
https://www.brookings.edu/articles/how-do-we-know-if-us-strikes-on-irans-nuclear-facilities-were-successful/
tl;dr We don't. They talk some more.
The same institute published a book in 2009 titles Which Path To Persia? which details possibilities, scenarios how to handle Iran and her nuclear program pdf related but available on libgen - libgen.st and libgen.bz worked for me now. Have not yet read, but plan of this bombing was in the making for quite a while, in fact probably was complete, waiting just for a President that says: I wanna do this.
Even the Israeli option is discussed: Chapter 5: Leave it to Bibi, which option is basically about putting Israel in the way of blowback, so the US is not blamed for the attack and this issue don't gets in the way of other US plans in the Middle East.
I have to say Trump just adding the final blow, and step forward as the peacemaker perfectly fits into the picture.