Communicators with Andrew Blum Author Andrew Blum talked about his book, Tubes: A Journey to the Center of the Internet, in which he describes the physical components and locales that allow the Internet to function throughout the world. He visited the networks, data warehouses, and undersea cables that make the Internet what it is, and described how they all fit into a system that connects the world. Mr. Blum participated by video link from New York City. close