Terence Roehrig is Professor of National Security Affairs and the Director of the Asia-Pacific Studies Group at the US Naval War College. He has been a Research Fellow at the Kennedy School at Harvard University in the International Security Program and the Project on Managing the Atom and a past President of the Association of Korean Political Studies. He is the author of Japan, South Korea, and the United States Nuclear Umbrella: Deterrence after the Cold War.
South Korea: Nuclear submarines not worth the cost
Seoul could buy five or six diesel submarines for the cost of one SSN.