Ahead of them. >> in an exclusive loon interview with nbc, -- looking at a mechanical problem with an actual as a possible cause of the crash. officials close to looking at this video of sparks on the train 20 miles before the derailment. >> every accident we investigate is always 100% preventable. >> now the ntsb has not given a concise timeline of when their investigation might be complete, but again, federal aid is expected to ramp up in the coming days. a new health clinic will be opening up in east palestine to address residents health concerns, this is as water in air testing continues. ...