Can medieval times help us sleep better today?; Young Jewish women who fought Nazis

The Atlantic's Derek Thompson went searching for answers to his sleep issues and in the process stumbled on some interesting sleep history. He tells us about how people slept in medieval times and whether it might be helpful to sleep-weary Americans. And, we revisit our conversation with Judy Batalion, author of the book "The Light of Days," which tells the stories of young women resistance fighters in Polish Jewish ghettos during World War II.