Nuclear submarine HMS Vanguard [Picture UK MoD] 28 May 2013 Ministry of Defence The contract to maintain the eyes and ears of the Navy's ships and submarines will sustain 530 defence jobs across the UK.
SOUDA BAY, Greece (March The Ohio-class guided-missile submarine USS Florida (SSGN arrives for a routine port visit to the island of Crete. Florida is homeport in Naval Submarine Base, Kings Bay. Navy photo by Paul Farley/Released)
Hunley Civil War submarine unveiled for first time, 12 January Charleston, SC. The Confederacy lost 21 crewmen in three sinkings of the Hunley during her short career. It was the first submarine to sink another ship.
Trident and the replacement debate
A guide to Trident and the debate about replacement - BBC News