Authorities in Pennsylvania are to file criminal charges against three students involved in a brutal beating on a school bus on Wednesday - and the bus driver who did nothing to stop the attack and didn't allow the two victims to flee from the vehicle. Police in Chester acted after they viewed video posted onto Facebook that shows one student on the Delaware County Alternative High School bus allegedly hitting 17-year-old Dylan Fonner in the face repeatedly. The grainy video which shows Fonner's face being bloodied, lasts seven minutes and was posted on the Facebook page belonging to one of...