Heres Max Boots column describing two movies that explain, in his view, "why we fight" in Afghanistan and Iraq. The first is Osama, now available on DVD. Its not about the infamous one, but about a girl who must work to support her family in Taliban-dominated Afghanistan.
The second is Voices of Iraq, compiled from footage gathered through the distribution of 150 digital video cameras to ordinary Iraqis. Theres a compelling clip at the site.