The death toll from Tuesday's shooting at a Texas elementary school has risen to 19 students and two teachers - all murdered by an 18-year-old gunman. The gunman was shot dead by a heroic Border Patrol agent who ran into the school with a tactical support team and killed him while he was barricaded inside, and exchanging gunfire with other Texas law enforcement officers. The gunman, Salvador Ramos - wearing body armor, equipped with a handgun and possibly a rifle - shot his grandmother before entering the school and opening fire, said Governor Greg Abbott. The grandmother was airlifted to...