Fire Damage Raises Questions About Sub's Future The severity of a fire that swept through a nuclear-powered submarine in dry dock at Portsmouth Naval Shipyard is triggering questions about whether the 22-year-old USS Miami can be salvaged. Officials say the Miami's nuclear propulsion was spared but forward compartments including living quarters, torpedo room and command and control suffered extensive damage. CORRECTS STATE TO MAINE INSTEAD OF NEW HAMPSHIRE - Smoke rises from a dry dock as fire crews respond Wednesday, May 23, 2012 to a fire on the USS Miami SSN 755 submarine at the Portsmouth Naval Shipyard on an island in Kittery, Maine. Four people were injured. (AP Photo/The Herald, Ionna Raptis) Close Defense analyst Loren Thompson says he'll be surprised if the sub is returned to service. Rear Adm. Richard Breckenridge, commander of Submarine Group Two, says it's premature to say whether the submarine can be repaired. The fire broke out Wednesday evening while the Miami was on a 20-month stay at the Kittery, Maine, shipyard for an overhaul. Two crew members, three shipyard firefighters and two civilian firefighters suffered minor injuries before the blaze was doused Thursday morning.