Driverless vehicles are usually hit from behind in slow-speed crashes by inattentive humans unaccustomed to machine motorists that always follow the rules.
California firefighters could knock drones out of the sky when they endanger aircraft making low-altitude runs to drop water on wildfires, under a bill lawmakers proposed.
National Guard troops moved into Baltimore after a black mans death in police custody set off riots, prompting officials to declare a state of emergency, impose a curfew and close schools.