Freight trains carrying he most dangerous chemicals know to man, are traveling through US cities/towns many times a day. Thousands of railroad conductors nationwide are now in jeopardy of losing their CAREERS and retirements due to removal of the 2 person crew mandate. (Many many many of which, voted for President Trump.) There are many dangers facing railroads and communities with a 1 man crew. PTC technology does not work in many of these dangers such as a heart attack, medical issues derailment, tiredness, fatigue, unknown work schedules, etc. Railroads are already realigning their business model, and laying off tens of thousands. This was before he mandate removal. Removing the mandate is a JOB KILLER. We will lose everything. Please instate a mandate for 2 man crews.