It will take months for the National Transportation Safety Board (NTSB) to examine all the evidence from Sunday’s fatal derailment on New York Metro North line in order to determine its cause. In the meantime, however, the press conferences, the media coverage, the statements by work colleagues and Union officials are giving us a picture that fatigue may have played a central role. One particular reported fact is of interest from the perspective of corporate sleep health policy: the Metro North train driver, William Rockefeller, changed from the afternoon shift to the day shift two weeks ago.