The focus of the hearing was to examine the challenges posed to first responders by the transportation of hazardous materials. Given the dramatic increase in the transportation of a wide range of hazardous substances, the discussion highlighted the increased need for preparedness and training for first responders as well as the transparency needed to equip these responders with critical information. The hearing discussed the process for integration of emerging threats into emergency response planning and discussed opportunities for critical data to be shared during the planning process.