BENTON, Ky. (AP) — A 15-year-old student killed two classmates and hit a dozen others with gunfire Tuesday, methodically firing a handgun inside a crowded atrium at his rural Kentucky high school. "He was determined. He knew what he was doing," said Alexandria Caporali, who grabbed her stunned friend and ran into a classroom as their classmates hit the floor. "It was one right after another -- bang bang bang bang bang," she added. "You could see his arm jerking as he was pulling the trigger."