1:52   Acting Secretary of the Navy announces Columbia-Class Submarine Contract 1:20   El submarino S-82 Narciso Monturiol avanza en las pruebas y completa su primera inmersión estática 3:03   Former Navy submersible pilot on what could cause cause 'catastrophic implosion' 3:06   Eyewitness Accounts Help in Solving the Mystery of Eagle 56 1:43   This U-Boat Was the Most Popular Submarine in Germany 7:12   Former Navy submarine commander talks about difficulty in sub rescue mission