Video Shows How Students Fled From Nashville Shooting

A heartbreaking new video captures a teacher and frightened children fleeing from the Nashville school shooting. The video was shot by James Hoffman, who heard gunshots and stopped to help. Hoffman says he slammed on his car's brakes, jumped out of the car and started waving to stop traffic to let them across the road. The video comes as police release chilling 911 calls placed from inside the school.