Please Explain: The Post Office

When you drop a letter in a mailbox, how exactly does it end up where it’s supposed to go? We’ll find out how the U.S. Postal Service works and why it’s struggling for survival. Nancy A. Pope, curator from the National Postal Museum and organizer of Systems at Work, and Richard John, professor at Columbia University School of Journalism and author of Spreading the News: The American Postal System from Franklin to Morse.