Overview: Tonight, the author of The Cigarette Century: The Rise, Fall, and Deadly Persistence of the Product That Defined America, Allan Brandt. "Mess O'Potamia" continues as Jon reports on the second bombing of a holy Shi'ite mosque in Samara by insurgents. Jon reports on Bush's war czar Douglas Lute who says that progress in the war is uneven. Jon also talks about how the military is now fighting alongside the very same insurgents they were fighting against, which brings to mind that old adage, the enemy of my enemy is my friend. The segment ends with Senior Iraq Correspondent Aasif Mandvi talking with Jon about these new developments in Iraq. Finally, Senior Black Correspondent Larry Wilmore didn't have much to say about any African-American related news, so after putting on a Detroit Red Wings cap he became a Senior Mexican Correspondent and talked with Jon about immigration reform.