Investigators want to know why the Amtrak train that derailed Tuesday night was traveling at a speed of over 100 miles an hour into a curve where the speed limit is just 50. And they say a new safety system could have slowed the train automatically and prevented the tragedy, but Amtrak and other railroads are behind schedule in implementing the technology.
The Amtrak train derailment in Philadelphia is raising a lot of questions about safety. Doug Riddell, a retired locomotive engineer, says, "The first responsibility of any railroader is safety."
The Labor Department's investigation follows an NPR/Mine Safety and Health News series about the failure of federal regulators to collect millions in safety penalties at the nation's mines.
Investigators are sifting through the wreckage trying to determine what caused the deadly accident. The NTSB says the train was traveling more than twice the recommended speed for the area.
Companies like Nestle are being eyed for how and where they're drawing the water. Steve Inskeep talks to Ian James, a reporter with The Desert Sun Newspaper in Palm Springs, Calif.
Steve Inskeep talks to Andre Perache of Doctors Without Borders about the situation in Yemen, where a humanitarian ceasefire began on Tuesday. Houthi rebels have controlled the capital for months.