Rear Adm. John Tammen Jr., USN, commander of US Navy Submarine Group 9 at Naval Base Kitsap-Bangor, discusses his unit’s missions, the challenges of keeping aging subs in service, the importance of the Ohio Replacement Program and more with Defense & Aerospace Report Editor Vago Muradian. The interview was conducted in early December at the Naval Undersea Museum in Keyport, Wash.
