The Navy must begin to consider the design of the next-generation attack submarine, according to the chief of naval operations. Adm. John Richardson told reporters Jan. 12 during the Surface Navy Association's annual conference in Arlington, VA, that the Virginia-class attack submarine fleet still has a lot of capability left in it. That said, "we've got to think about the next-generation combatant, undersea and surface . . . things are moving so fast so you have to start thinking ahead,"...