CBS NEWS US - A tractor-trailer collided with a school bus carrying about two dozen students and adults Wednesday in western Pennsylvania, killing the truck driver and injuring at least 21 people, most of them students, authorities said. The crash occurred on Route 281 near Rockwood just after 2:30 p.m., state police said. The truck and a school bus taking Turkeyfoot Valley Area School District students back from a vocational and technical school in Somerset struck each other. - Go To Story