This episode covers incidents of mass violence.
At least 21 people, including 19 children, were killed when a gunman opened fire at the Robb Elementary School in Uvalde, Texas, on Tuesday morning.
It was the deadliest school shooting in the United States since the 2012 attack on the Sandy Hook Elementary School in Newtown, Conn.
For some of the Sandy Hook parents, news of yet another school massacre provoked a chilling sense of numbness.
Guest: Elizabeth Williamson, a feature writer for The New York Times and the author of a book on the aftermath of Sandy Hook.
