Repost from PBS News Hour
[Editor: On this highly influential PBS Newshour video, reporter Judy Woodruff  gives background on recent derailments and explosions and concludes with an interview of NTSB Chair Deborah Hersman.  Hersman urges action by the regulatory agencies to phase out the deadly DOT-111 tank cars, as is being done in Canada.   This 8 minute video was seen by millions of PBS viewers on Wednesday, April 23.  (My apologies for the unavoidable commercial ad that begins this video.)  – RS]