This video is the best summing up I've seen in a long time of why Bush, Cheney, Rove et al. merit to be called liars:

http://tinyurl.com/2vuvda

Though the call to arms against Iran has been a little less up front, it's depressingly logical that when an Intelligence report undercuts the claim that Iran is for sure preparing to develop nukes, Bush will just wave it aside with "Well, it doesn't prove anything...Even if they stopped their program in 2003 they may have started another program to build a nucular bomb"
(if that were true, what would it say about the overall standard of US intelligence on the Middle East??)