The driver of a cargo truck died as the result of the crash on the Interstate-10 freeway in Tucson of the vehicle carrying toxic nitric acid. Public safety officials closed the section of the freeway as workers cleaned up the spill cite. For an assessment of the response of officials to the incident, a reporter talked to Kiril Hristovski, an associate professor in the Fulton Schools environmental resource management program and a senior sustainability scientist. Hazardous materials management is one his areas of expertise. Hristovski said the response to the nitric acid spill on the roadway was appropriate because the nitric acid was neutralized by being quickly covered in soil and transported from the scene.