A $2.3 billion nuclear submarine named for North Carolina is undergoing its first set of sea trials.
Northrop Grumman said the new sub left its Newport News shipyard Wednesday for the trials. The USS North Carolina is the
fourth sub of the Virginia-class nuclear attack vessel, which is replacing the Los Angeles-class boats.
The trials test all the ship's systems and include submerging for the first time and high-speed runs on the surface and submerged.
The North Carolina is a joint project between of the Northrop Grumman and General Dynamics Electric Boat of Groton, Connecticut. Construction started in 2002.