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The Naval Sea Systems Command (NAVSEA) is the largest of the United States Navy's five "systems commands," or materiel (not to be confused with "material") organizations. NAVSEA consists of four shipyards, nine "warfare centers" (two undersea and seven surface), four major shipbuilding locations and the NAVSEA headquarters, located at the Washington Navy Yard, in Washington D.C.
NAVSEA's primary objective is to engineer, build and support the U.S. Navy's fleet of ships and its combat systems. NAVSEA accounts for one quarter of the Navy's entire budget, with more than 150 acquisition programs under its oversight. The five Navy systems commands are:
The Naval Sea Systems Command was established on 1 July 1974 with the merger of the Naval Ship Systems Command with the Naval Ordnance Systems Command. The Naval Ship Systems Command was established in 1966 replacing the Navy's Bureau of Ships (BuShips). Established in 1940, BuShips succeeded the Bureau of Construction and Repair, which had been responsible for ship design and construction, and the Bureau of Engineering, which had been responsible for propulsion systems.
The current[when?] NAVSEA facilities are:
Naval Sea Logistics Center
Vice Adm. William H. Hilarides became the 43rd Commander of NAVSEA on June 7, 2013.
On Monday, September 16, 2013, a 34-year-old former U.S. Navy veteran and current IT contractor, identified as Aaron Alexis, gained access to the yard using a valid ID card entered Building 197 and opened fire with a sawed-off shotgun, killing twelve people and wounding three others, including a D.C. police officer. Alexis was killed after engaging in a shootout with responding police.