Charles Duelfer was one of the most senior intelligence officers with on-the-ground experience to have worked in Iraq before, during, and after the Gulf War. While serving as the leader of the CIA’s Iraq Survey Group, his 2004 report is widely renowned as the most authoritative account on the relationship of the Saddam regime to weapons of mass destruction, as well as how the world was led to believe that Iraq possessed WMDs. But until now, Duelfer has never publicly shared his expertise on just how the US-Iraq relationship spiraled into a second war, and the lessons that can be applied to the challenges ahead in Iran and North Korea.