The Radiation Injury Treatment Network seeks to increase awareness and understanding of the tremendous environmental, social, and medical cost of a mass casualty incident resulting from a nuclear or radiological disaster, such as a deliberate attack or complications from a natural disaster.  This workshop will engage attendees through discussions about recent developments in the mitigation and treatment of radiation damage including:  patient assessment, biomarkers and biodosimetry, suitability of animal models, small molecules, growth factors, and cells as mitigators, as well as their mechanisms of action in radiation-damaged tissues, late effects of acute and prolonged exposure, survivorship issues, and future developments.  Additionally, the workshop will include the open sharing of lessons learned from preparedness efforts in a collaborative environment to allow attendees to capitalize upon peers efforts at their institutions.