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By David Shepardson WASHINGTON (Reuters) - Tesla Motors Inc told U.S. Senate Commerce Committee staff it is considering two theories that may help explain what led to the May 7 fatal crash that killed a Florida man who was using the car's "Autopilot" system, a person familiar with the meeting told Reuters on Friday. Tesla staff members told congressional aides at an hour-long briefing on Thursday that they were still trying to understand the "system failure" that led to the crash, the source said. Tesla is considering whether the radar and camera input for the vehicle’s automatic emergency braking system failed to detect the truck trailer or the automatic braking system’s radar may have detected the trailer but discounted this input as part of a design to "tune out" structures such as bridges to avoid triggering false braking, the source said.
Hillary Clinton and Donald Trump traded insults at opposite ends of the country Friday, taking their fight for the White House to rival battleground states and portraying starkly different visions of America. Clinton followed her historic acceptance speech on Thursday as the first woman presidential nominee for a major party with a rally in Philadelphia before embarking on a bus tour of Rust Belt states Pennsylvania and Ohio. In Colorado, a key state out west, her Republican opponent promised "no more Mr Nice Guy," trashing Clinton's speech as "average," calling her a liar and promising to end the migration of Syrian refugees.