A family that gained attention for an emotional photograph of an African-American boy hugging a white police officer at a 2014 protest was killed when their SUV plunged off a scenic California highway, authorities said Wednesday as they asked for help figuring out what happened. "We have every indication to believe that all six children were in there," Mendocino County Sheriff Tom Allman said, appealing for tips to retrace where the siblings and two parents had been before the vehicle was found Monday in rocky ocean. "We know that an entire family vanished and perished during this tragedy." Some...