If we attack Iran we can count on counterstrikes here in the USA. They've had lots of time to plan something.
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 US doesn't have to do anything. Israel will take care of this problem easily and efficiently, like they did with Saddam's nuclear facility some years ago. The Israeli air force is so far superior to the Iranian defenses that it is unlikely they will lose a single aircraft.