Historical case studies are an essential element of understanding the national security system are intended to inform proposals for reforming US government interagency support for national security activities by identifying trends, recurring issues, challenges, solutions and lesson learning to responses to complex operational demands in the past. The following is a list of case studies conducted under the project. Under the direction of Richard Weitz of the Hudson Institute, these case studies have been selected to illustrate the enduring nature of interagency challenges and to explore how the United States responds to crises that have significant non-military dimensions.