Iran will not use a dirty bomb—if they do the west will respond with clean nukes and lots of them. Most of what is said it all talk but, such things could become a cause for war. The nation of Iran is falling apart from the inside and they may seek a war to unify their people. Wars have a way of taking on a life of their own. What you wanted to do at the start isn’t always they way things turn out.
What exactly makes you think Obama will respond with nukes and not apologies?
I sincerely doubt the west will do much more than blather and perhaps put together an army using conventional weapons. The west has few leaders any more and none who will run ahead of the pack. This is the age of ‘consensus’ and ‘diplomacy’ (AKA cowardice) .
Dirty or clean makes no different to Iran. They will attempt to use one on us and perhaps succeed. The crowd in DC is preoccupied w/ preening and jockeying for position. When and if the attack comes they’ll be taken by surprise, as usual.
This is begining to look like a Guns of August situation, if we don’t get a hold on it soon.