IMO if Iran had a way to attack us we would have already been attacked. Right now I believe Iran is behind the insurgency in Iraq. Thas said.
Should Iran be atacked militarily Yes
Should the United State ba part of that attack? No. Not unless we are practically begged to be there.
Right now Iran is no threat to the Comntinental United State, while it is a threat to Europe.If the Europeans wish to live under threat from a crazy bunch of persian scum then thats their choice, If they wish to take Iran on with a European Coalition and need Logistic or Air helps then we should supply that. Europe let us down now let them hold themselves up.
The Soviet Union was no threat to the continental United States in 1948 but that did not stop far-seeing leaders from establishing NATO to keep the Red Army where it was.
The first notification of the existence of a definite islamic "threat to the continental United States" will be just a bit too late.
I'm not interested in waiting for that threat to develop. The first Cold War, with determined but sane and calculating Soviets, was bad enough for my taste. Now we are talking about psychotic moslem A-holes playing around with nukes, who consider a retaliatory strike from the West as causing mere "damages."
The answer to the question in the title is, "whatever it takes."
Bwaaahaaahaaa. You jest, my friend. Can you really imagine those Euro-wussies standing up for themselves?!