Ya know I had read last year or so that Russia said if Iran were ever attacked by the U.S. they would aid them. I believe China said the same that but not as certain on that.
If all this really goes down then I can see another huge war coming up. I highly doubt Israel will stand around much longer while Iran works on a nuclear weapon. They have stated many times they want to wipe Israel off the face of the earth. But with a weapon of mass destruction they would have the ability to give it a try & blame terrorist for the incident.
Iran don't stand a chance in hell against Israel.