Naval Sea Systems Command headquarters

People come out from a bulding with their hands up after a shooting happened at the Washington Navy Yard September 16, 2013 in Washington, DC. (Photo by Alex Wong/Getty Images)

Officials: 12 People Killed In Washington Navy Yard Shooting

At least one gunman opened fire inside a building at the Washington Navy Yard Monday morning and officials said at least 12 people were killed and several more wounded, including a law enforcement officer.

09/16/2013