The Last Word with Lawrence O'Donnell 05/12/15

Eyewitness to Amtrak train derailment speaks

As rescuers try to help those injured in an Amtrak train derailment just outside Philadelphia, Lawrence talks to NBC Nightly News producer Janelle Richards about what she saw when the train derailed and the rescue operations that are underway. ... more Duration: {{video.duration.momentjs}}