FILE - A sign reads "Keep Out Testing & Cleaning in Progress" near the Sulphur Run Creek as it flows under homes near the 2023 Norfolk Southern train derailment in East Palestine, Ohio on Wednesday, June 12, 2024. The National Transportation Safety Board’s daylong hearing on what caused the East Palestine derailment and how to prevent similar disasters gave the community, railroads and policymakers plenty to think about. (AP Photo/Carolyn Kaster, File)