I never said anything about an invasion, and I think the idea of one is not a good idea at all. If you go back and read (for a change) you'll see that I already said this can't be "solved" without considerable support, that is also not that likely to come. For reasons of self interest, most of the "stakeholders" are willing to sit back and do their thing, figuring the US will come along like the cavalry if and when needed. That gives them the best of both worlds. Problem comes from the proliferation side. Were Iran to actually "go nuclear", it probably would not be long before Saudi Arabia followed suit, and perhaps a few others.