Washington: Family and friends rush to greet staff of the Naval Sea Systems Command headquarters after they were bused from the Washington Navy Yard to Nationals Park, in Washington, Monday, Sept. 16, 2013. At least one gunman launched an attack inside the Washington Navy Yard, spraying gunfire on office workers in the cafeteria and in the hallways at the heavily secured military installation in the heart of the nation's capital, authorities said. AP / PTI(AP9_17_2013_000004B)