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

Rescuers still entering train cars

msnbc's Lawrence O'Donnell shares the information that rescue workers are still entering cars on the Amtrak train that derailed outside of Philadelphia Tuesday night. O'Donnell is joined by msnbc's Patrick Murphy who was on the train & NBC's Jay Blackman. ... more Duration: {{video.duration.momentjs}}