Israel cannot do anything against Iran militarily without full US support. Everyone knows this. Even with full US support, an israeli air attack has a very slight chance of any sort of success since Iran made special arrangements with regards to its site locations and defenses. The various israeli aircraft on the ground in iraq have already been exposed by the media.
Report: Iran's Culture Ministry refuses to allow Barenboim to perform in Tehran (DPA)
from the article: Barak: Dagan's comments on Iran hurt Israel's ability of deterrence