On May 7th, 2016, Joshua Brown, a 40-year-old entrepreneur and technology enthusiast from Canton, Ohio, was sitting behind the wheel of his Tesla Model S sedan when a tractor-trailer turned across his path. The Tesla, which was engaged in its self-driving Autopilot mode, failed to register the white tractor-trailer against the bright, sunny Florida sky. Mr. Brown also didn’t engage the brakes in time. His Tesla crashed into the truck at 74 miles per hour, killing him almost instantly.