This is pretty much Bush's answer:
Extend diplomatic relations until Iran, based on international intelligence, reaches a point where they are pretty close to having nukes. Then, at that point, regardless of what the UN says, you launch missiles from afar and destroy all nuclear facilities located from our satellite GPA systems. No new US or other international troops will have to be committed.
There are currently 8 countries in the nuclear family as far as I can recall: US, England, France, Israel, Russia, China, India, and Pakistan. North Korea, along with Iran, is on the verge of joining this family. It should be the goal of the UN and especially the US to keep no new members from joining - at all costs, war or no war, troops or no troops, draft or no draft.
This is pretty much Kerry's answer:
Go along with the UN no matter what. If Iran does develop nuclear weapons, so be it. Let's just all hold hands and pray nothing bad comes of it.