Iran will con us. The decision can be reversed by Iran when appropriate or necessary. You cannot make deals with the devil. In any case Iran would never use a nuclear weapon even if it had one. It would be totally suicidal. Why all the fuss? Yes, I know it is the principle of the thing. The US, Israel, Russia and others are capable of wiping Iran off the face of the Earth. Who is being stupid?
Suspected assailant in car-ramming attack in West Bank shot (Haaretz)
from the article: U.S., Iran seek closer ties alongside nuclear program