This article, while not one hundred percent on the subject of your post, does, I think, give some indication of what the US government is thinking on the subject of Iran:

Kay Warns U.S. Not to Repeat Iraq Mistakes in Iran

Maybe the Bush administration thinks if it takes over and occupies Iran (can you say domino theory?), that will take care of everything.

On a somewhat tangentially related subject, the US budget that Bush is submitting to Congress includes cuts in medical care to Veterins and the poor. The average US taxpayers (including the working poor) are subsidizing the military adventurism of the Bush administration (enriching, in the process, the oil industry and other industries that benefit financially from war) at the cost of their own ability to maintain even the most basic standard of living.

Bush sends Congress $2.57-trillion US budget; record deficit despite steep cuts