I first heard about this documentary when watching an interview with William Kristol on "CSPAN Q&A". The name of it is "Why We Fight". I can't do the preview justice by trying to describe it here, so check it out at this link:
http://www.sonyclassics.com/...
It comes out on DVD on June 20th. It looks really interesting, in my opinion much more so than "Fahrenheit 911".