It's been about five months since a Norfolk Southern train carrying toxic chemicals crashed in East Palestine, a town right on the edge of the Ohio-Pennsylvania border, a little south of Youngstown. A number of the cars were carrying hazardous materials. And in an attempt to avoid a possible explosion, there was a controlled dayslong burn of those chemicals. Residents within a mile radius of the crash were evacuated. Days later, the evacuation order was lifted, and some residents say they developed rashes and nausea. The crash became a national flashpoint and a hot-button issue on both sides of the aisle. Not long after the derailment, Norfolk Southern CEO Alan Shaw found himself in front of Congress, being grilled by a group of bipartisan lawmakers. In March, Democratic Senator Ed Markey of Massachusetts asked Shaw whether he would support legislation requiring two-person train crews at minimum. Shaw didn't answer.