Shooter at large after gunfire at Florida high school: police

PARKLAND, Fla. (Reuters) - A 19-year-old gunman returned to a Florida high school where he had once been expelled for disciplinary reasons and opened fire with an assault-style rifle on Wednesday, killing 17 people and injuring more than a dozen others before he was arrested, authorities said. The violence erupted shortly before dismissal at Marjory Stoneman Douglas High School in Parkland, a p...