The former nuclear "deal" was basically worthless, and only kicked the can down the road in regards to actual nuke development and did virtually nothing to stop the development of delivery systems. It was akin to leaving everything in place to actually be ready to make bombs while allowing the rapid advancement of nuke delivery systems which at current rate have and would be formidable once the can was no longer being kicked.
Thanks to the Obama TarmacBillions they already have drones and cruise missiles that render U.S. missile systems obsolete, at least the systems as operated by the incompetent Saudi's.