Billionaire investor Warren Buffett on Wednesday slammed Norfolk Southern Corp.’s NSC handling of a February train derailment in East Palestine, Ohio.”I think they’ve handled it terribly…they were tone deaf,” Buffett told CNBC in an interview from Japan. Buffett’s Berkshire Hathaway Inc. BRK.A BRK.B owns rival railroad Burlington Northern Santa Fe, or BNSF. No one was killed or injured in the Ohio derailment, but the incident has been described as a “PR nightmare” for Norfolk Southern and the rail industry. The derailed cars included 11 tank cars carrying hazardous materials that subsequently ignited, damaging an additional…