terrorist nuclear detonation of 10 kilotons would have catastrophic physical, medical, and psychological consequences and could be accomplished with a device in a small truck. Tens of thousands of injured and ill survivors and uninjured, concerned citizens would require medical care or at least an assessment and instructions. In proximity to the incident location, there would be a huge imbalance between the demand for medical resources and their availability. 1-3 Beyond the immediate blast area, much of the infrastructure would remain intact. Most people would reach medical care by selfreferral and require sorting and assessment to determine what medical intervention is necessary, appropriate, and possible. No society has the resources to deliver the full spectrum of care needed in the time frame required. Yet, careful planning and a clear understanding of how best to allocate scarce resources, triage and evacuate patients, and implement crisis standards of care have the potential to save thousands of lives and provide comfort to those unlikely to survive. The US government and nongovernment experts continue to develop planning guidance, 1,4-8 medical countermeasures, 9,10 and medical specialty capacity and capabilities. 11-13 This Scarce Resources for a Nuclear Detonation Project provides data, supporting information, and tools for medical planners and responders to address the issues of scarce resources 14 and plan for triage and resource allocation in the first 4 days postdetonation, when there will be severe shortages.