Segment 1: Is the conversation around guns, schools and violence changing? Teens in Florida have been galvanized to speak out about mass shootings at American schools. But what is happening here? Have our thoughts shifted about school shootings? Steven Rich , Database Editor for Investigations, The Washington Post and co-author of " No, there haven't been 18 school shootings in 2018. That number is flat wrong ." Maggie Koerth-Baker , Senior Science Writer, "FiveThirtyEight" and author of " Mass