OK, let's say we send B-1 and B-52 bombers and take out Iran's nuclear installations as best as possible, while at the same time we destroy other key military bases or installations.
What is Iran going to do? Attack Manhatten?
Send an armada to invade San Fransisco??
They won't do crap but complain, cause they don't have the resources for an intercontinental invasion.
oh yeah, they might take some token actions against the nearest US Army base, which I am sure would be on the highest alert possible.
Bottom line: We would have destroyed the nuclear threat temporarily, and we would have sent a message to the lunatic Muslim fringe.
What other choice would we have? Let Iran continue to build and build nuclear bombs until the entire world is threatened with anniliation?
Couple of problems with your scenario. One, despite all the talk we have never won a conflict on airpower alone. Your scenario would bomb the crap out of Iran and leave a hostile government in place. You don't think they won't find a way to get payback? Second, look at Iran's best customers for oil. UK. Japan. India. China. All are on the list. None are going to support us in this. So you would have us go to war while still trying to prop up Iraq and I'm pointing out that we don't have the troops, or the allies to do it.