An 18-year-old gunman killed 14 children and a teacher at an elementary school in Texas on Tuesday, according to the state’s governor, in the nation’s deadliest school shooting in years. The attack in Uvalde, Texas — a small community about an hour from the Mexican border — is the latest in a spree of deadly shootings in the United States, where widespread horror at gun violence has failed to spur action to head off future […]