Throughout its history, New York City has been a battleground for international espionage, a place where secrets are created, stolen and passed on through clandestine meetings and covert communications. In over 200 entries, H. Keith Melton and Robert Wallace’s beloved guidebook “Spy Sites of New York City: A Guide to the Region’s Secret History” takes you inside this shadowy world and reveals the places where it all happened. Join us for a look at a side of the city you’ve never seen before with H. Keith Melton and Robert Wallace in this edition of Leonard Lopate at Large on WBAI.