Yet another mass shooting has happened at an American school. The shooting in Parkland, Florida on Wednesday is one of the deadliest school shootings in modern U.S. history. The 19-year-old gunman killed 17 students and staff members when he carried an AR-15 rifle into the building. What will it take to stop these shootings? And what will and should schools do in response? We’re joined by local superintendents who share the steps they’re taking in their districts, and how they talk to students