S-300's are being delivered to Iran...

via Sputnik

On November 9, Russia signed a new contract with Iran on the delivery of "about 300" S-300 air defense systems, according to Russia’s state technologies corporation Rostec.
The delivery of Russian-made missiles is expected to be completed by the end of 2015, Iranian Defense Minister Brig. Gen. Hossein Dehqan said on November 10.

Here.

And with this the failure of two president's over the span of 16 or so years is complete.

Iran will not only get nuclear weapons but they'll have the means to protect them.  All the talk about F-35's being able to destroy S-300's is wishful thinking.  These missiles, as part of an integrated missile defense system, will make any attacking force suffer badly.

Oh and consider this.  The Iranians were able to knock down one of our stealth drones that is orders of magnitude more stealthy than the F-35.

Saudi Arabia will get nuclear weapons and once they do (probably before the end of this year or early next), my prediction about ISIS being a pleasant memory will come true.  We're going to pivot to worrying about nukes in the middle east.  Nuclear war there is no longer a matter of if but when.