160308-N-PM506-005— BREMERTON, Wash. (March 8, 2016) Ohio-class ballistic missile submarine USS Nebraska (SSBN 739) undocks from a dry dock at Puget Sound Navy Shipyard and Intermediate Maintenance Facility. Nebraska has been at the shipyard since February 2014 for an Engineering Refueling Overhaul, which provides up to 20 years of additional service life for the submarine. Once the ERO is complete, Nebraska will continue its role in strategic deterrence, a fundamental element of the U.S. defense strategy. PSNS & IMF performs this and other work as part of its mission to maintain and modernize the Navy’s fleet. (U.S. Navy photo by Zack Frank/released)