Jim Michaels, USA TODAY
Washington-- The shooting Monday at the Navy Yard here took place in Building 197, the headquarters of the Navy Sea Systems Command, an essential component of the country's sea service.
According to the Navy, the Naval Sea Systems Command (NAVSEA) is the largest of the Navy's five system commands. About 3,000 people work in the command headquarters at the Navy Yard.
It has an annual budget of almost $30 billion, and the command makes about 25% of the Navy's entire budget. The command has a total workforce of 50,000 civilian, military and contract support personnel. The command engineers, builds, buys and maintains the Navy's ships and submarines and their combat systems, according to the Navy. It has facilities around the world.
The headquarters is at the Navy Yard, which was established in 1799 and is the oldest shore establishment of the U.S. Navy.
Washington's Navy Yard area has gone through a revitalization in the last five years since the completion of the stadium for the National League's Washington Nationals. It also close to Capitol Hill.