A charter bus filled with high school students is rear-ended by a semitruck on an Ohio highway, killing 6 and injuring 18 others, officials confirm. Five vehicles were involved in the crash. Three passengers on the bus, which was carrying a driver and 54 students and chaperones, were pronounced dead at the scene. All three people in one of the passenger vehicles involved were also pronounced dead at the scene. All this about 25 miles east of Columbus. A team of National Transportation Safety Board investigators is at the scene.