Every other Tuesday, early in the morning and no matter the weather, you can usually spot 17 National Security Fellows (NSFs) making their way from different parts of Boston to a Belfer Center third-floor conference room in Cambridge. They come from all military services, the Coast Guard, Office of the Secretary of Defense, National Geospatial-Intelligence Agency, and National Reconnaissance Office. Their research at the Center this year covers a broad range of national security issues from governance and corruption in multiethnic societies to defense technology, artificial intelligence, and space capabilities. They are as different as their professional backgrounds suggest, but on these Tuesday mornings they are united by their eagerness to hear directly from one of the most disciplined military thinkers of our times - General Joseph F. Dunford, Jr. (ret.).