I'd like to reiterate how strongly I would oppose a unilateral air strike on Iran's nuclear facilities. Some time ago, we sent a second carrier strike group to the gulf. A bit of sabre rattling, but not something to be alarmed about. In fact, I suspected that Bush's personality might come as an advantage in this standoff with Iran. Think about it - if Americans are worried whether Bush is going to bomb Iran, Iranians have got to be wondering more when than if its going to happen. In this game of diplomatic chicken that we seem to be playing, perhaps that might be the impetus that the Iranian leadership needs to negotiate a deal.
A strong position against Iran is very important. While Iranian support for Iraqi Shia insurgents is mostly exaggerated, Iran's support for Hezbollah is well documented. As we saw last summer, that proved to be a very destabilizing force in the region. I'm also very concerned with the Iranian nuclear pursuit, as I've written before. Not because I'm concerned that Iran will go and nuke Israel or even pass off nukes to terrorists (which is possible, but unlikely). The main risk is that Iranian nukes spark a regional arms race with the Gulf Arab states; Saudi Arabia and Egypt in particular. A nuclear armed Middle East would be a disaster waiting to happen.
This all being said, a strike on Iran's nuclear sites would be a disaster. It would rally their people around the government at a time when Ahmedinejad is becoming less popular in Iran for his extreme rhetoric. The air strikes would probably do little, if any good. We set back the nuclear program for a couple of years, and then what? Iran could retaliate throughout the world; in Iraq, Europe, and America. If we think the Shia insurgency in Iraq is bad now, just wait till we bomb Iran. Its just not worth it, not yet anyways. If we must do something, we should impose an oil embargo with our Navy - prevent Iran from exporting any of its oil.
The reason I write this now is because I've just heard that Bush sent a 3rd carrier strike group to the Middle East, and now I'm nervous that Bush isn't bluffing. If legally possible, congress should pass legislation that would prevent Bush from striking Iran without congressional approval. And Americans need to speak up and make sure this President knows that we don't want another war.