U.S. Capitol Police who responded to incident are currently working unpaid due to federal government shutdown.
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.
The head of the National Security Agency is defending government eavesdropping on the phone and Internet communications of millions of Americans, even as some members of Congress express surprise at the extent of the program.
Following an intense manhunt that caused chaos in Massachusetts and riveted the rest of the nation, law enforcement finally captured the second Boston Marathon bombing suspect on Friday night.
Criminologist Jack Levin at Northeastern University said Adam Lanza’s isolation and a possible rivalry with other mass killers are characteristics that the Sandy Hook gunman shares with other shooters.