Presents an overview of a tool for assessing the potential security risks at chemical facilities, focusing on terrorist or criminal actions that could have significant national impact or could cause the airborne release of hazardous chemicals resulting in deaths and contamination. The twelve-step assessment methodology was developed by NIJ in partnership with the U.S. Department of Energy's Sandia National Laboratories, with the cooperation and assistance of chemical industry representatives. The U.S. Department of Transportation has developed a related publication to assess risks in the transportation of chemicals and other hazardous materials, the Risk Management Self-Evaluation Framework , available from the Office of Hazardous Materials Safety, U.S. Department of Transportation.