The Fifth Estate brings us The Lies that Led to War, a CBC documentary which covers the lead up, and selling of the war. Originally aired March 7th 2007, this film pulls no punches while they look more deeply into the horrific acts of Saddam at Halabja in 1988, the source of Bush's mantra: he gassed his own people. Thankfully they add the important, but missing, appendage "... with our [USA] help".
After this refresher on the beginning of the mess in Iraq, take a look at Frontline's analysis of the 'Surge' and the decisions which led to its implementation: Endgame. In the eyes of many non-partisan officials the Surge is the last best hope for any kind of victory in, or even a graceful withdrawal from Iraq.
If you really feel like a depressing hundred hours or so, Frontline has a full listing of all of its films covering the War on Terror. That page is a treasure-trove of fantastic resources to learn more about the family of military conflicts which will speak to history books about our morality, civility and in many ways, our sanity.