US probes Tesla on autopilot system failures after fatal crash

The U.S. government has asked Tesla Motors for detailed information about key safety systems on its cars after a May 7 crash in which a driver was killed while traveling in autonomous mode.In the accident, a Tesla Model S in autopilot mode failed to recognize a truck being driven across the highway in front of it and slammed into it. The roof of the car was torn off and the driver was killed.In a letter sent to Palo Alto-based Tesla Motors, the National Highway Traffic Safety Administration (NHT