Every city has its own iconic food, particularly a sandwich. And in Chicago, it's the 'Italian Beef,' made even more well-known by the recent TV series "The Bear." Historian Anthony Buccini shares the facts of why it's Italian. We learn how the sandwich went from being served at festive occasions to being a staple take-out from a sandwich stand, all the while preserving its socio-cultural place in the cookery of Naples.