EAST PALESTINE, Ohio (AP) — The National Transportation Safety Board says Norfolk Southern and its contractors botched the decision to blow open five vinyl chloride tank cars after last year’s disastrous derailment in East Palestine, Ohio, and track-side detectors that might have prevented the crash failed to accurately detect the temperature of a burning wheel bearing 20 miles beforehand, according to the National Transportation Safety Board’s investigation. Investigators said the railroad and its contractors ignored data about the tank cars and failed to accurately present information to decision-makers from the chemical manufacturer. The NTSB also recommended that federal standards be established for the track-side detectors that are supposed to catch mechanical problems that cause derailments.