MSNBC Live with Tamron Hall 05/14/15

NTSB: 'PTC' technology would have saved Amtrak train

Sen. Richard Blumenthal, D-Conn., and Sen. Charles Schumer, D-N.Y., introduced legislation requiring railroads to install the new “Positive Train Control” technology that the NTSB says would have prevented the derailment of Amtrak Regional 188. ... more Duration: {{video.duration.momentjs}}