"After 9/11, there was an enormous need in the US to do something big, to smash stuff up and punish people for the hurt that had been done to Americans. Afghanistan was a logical and legitimate target of that anger, but it fell practically without a fight and left the national need for vengeance unassuaged. The invasion of Iraq was an emotional necessity if the rage was to be discharged, even though Iraq had nothing to do with 9/11 and posed no threat to the United States.
In this interpretation, all the talk about attacking Iran is the last wave of this emotional binge running feebly up the beach, and it is unlikely to sweep everything away. The talk is still macho, but the performance is not there to back it up. What the US public gets for all the taxes it pays on defence -- currently around $2,000 a year for every American man, woman and child -- is armed forces that are barely capable of holding down one middle-sized Arab country.
There simply aren't any American troops available to invade Iran, and air strikes will only annoy them. What would really tip the whole area into an acute crisis is a re-radicalised Iran that has concluded that it will never be secure until it has expelled the United States from the region."
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http://www.gwynnedyer.net/articles2005.htm>On Edit: fixed link. Click on January 17th article.