In the aftermath of 9/11, the United States Intelligence Community had to reorganize in order to address an unprecedented threat from global terrorism. A large-scale strategic terrorist attack on the US homeland force the IC to rethink their mission, restructure their operating principles, and re-prioritize their threat assessments. From 2001 to 2008, Rolf Mowatt-Larssen led the government's efforts to prevent a nuclear terrorist attack on the United States. Recounting his experiences during this time, Rolf will examine how the intelligence community shifted their operations to prevent the WMD threat from non-state actors abroad. He will cover the organizational mission, the IC's planning principles, and provide an assessment of what worked and what did not. Most importantly, he will consider the lessons that can be drawn from this experience to be applied to confront the new unprecedented threats we face today.