I am a farmer by trade but have worked on the side with insurance for some time because I need money.🙂
If your agent has told you your premium went up in Iowa due to 9/11 they are full of crap as most agents are. The only changes in premium as a direct result of the attacks would be for risks that may be subject to attack. Most personal policies have exclusions for terrorist attack, war defined or undefinrd, civil disturbance, etc. If Mohammed Atta had flown a plane into your house your company would have kindly explained you were SOL. The only reason many of the personal claims were paid out in NYC were because the eyes of the world were watching. No company in their right mind would deny a claim there. it would be business suicide.
Next time it will be different. More policy language is being inserted concerning this weekly. All insurance companies "insure each other" through what is called reinsurance. So, every company paid out big due to 9/11 whether they actually had their name on a policy or not. Your rates may go up to replace some dollars in the companies pot, but, it is not for the reason that your risk has went up. it's because the reinsured poorly.
Home rates across the US will be going up around 30% this year everywhere with everybody. Its just easy for them to lay it off on 9/11 cause most people then nod their head thinking it makes sense when its bullsh!t. Hope that helps a little.