In the Feb. 3 East Palestine incident, the NTSB said it appears a bearing in a rail car failed, causing a derailment that involved cars containing vinyl chloride, a flammable chemical used as a precursor to many plastic products. An evacuation order was issued for the area around the derailment site, and the chemicals were released from the cars into a trench, where they were burnt off.
Following the death of a train conductor Tuesday, Norfolk Southern CEO Alan Shaw pledged to hold companywide safety briefings on Wednesday — one day ahead of when he is scheduled to testify in Congress at a hearing on the East Palestine derailment.