OMAHA, Neb. (AP) — Transportation Secretary Pete Buttigieg wants the nation’s freight railroads to immediately act to improve safety while regulators try to strengthen safety rules in the wake of a fiery derailment in Ohio that forced evacuations when toxic chemicals were released and burned. Buttigieg announced the reforms Tuesday — two days after he warned Norfolk Southern to fulfill its promises to clean up the mess just outside East Palestine, Ohio, and help the town recover. The railroad reiterated its commitment to safety and aiding East Palestine but didn’t directly respond to Buttigieg’s criticism. The head of the EPA plans to return to the town Tuesday to talk about the next steps in the cleanup and efforts to keep people safe.