I agree with your point concerning the lack of an international supervision but I do not agree with your belief that an attack on Iran is not viable. The Iraninan regime can be put to the ultimate test and their emergency services strained beyond belief. They must pay for their crimes with their lives and it is time to stop fretting over Iraninan responses because they will have enough problems putting their country back together and dealing with casualties in the millions.
Israeli soldier lightly wounded after being hit by car south of Hebron (Haaretz)
from the article: Ahmadinejad awaits a response