The Iraqi military--and Iraqi government--is being very insistent in the negotiations with the United States that it wishes to purchase 96 F-16 fighter planes. It has already purchased 120 M1A1 tanks and been given 20 more. It wants to buy another 120. That's 240 tanks and 96 aircraft--more than you need to defeat al Qaeda in Iraq.
Some Iraqi officials are on the record as saying that the principal purpose of these armaments is to defend Iraq's borders. This is a good example, to my mind, of how Iran's nuclear program only creates suspicions in the region and leaves Iran's security worse off.
We should remind ourselves that the reason most countries don't pursue nuclear weapons is not because they're pacifist at heart but because they do not want to start arms races. Iran seems to have forgotten that lesson. Iran is starting an arms race--which, frankly, it is going to lose. It has neither the money nor the powerful friends that some of its neighbours do.
So I think we can make a good case that nuclear weapons are not in Iran's security interest. These arms purchases in the Middle East that I spoke of are overwhelmingly for systems that seem well suited to dealing with the threat from Iran, or well suited to responding to Iranian provocation, but not well suited to other defence needs.