Cathleen Alexis

A police officer checks the ID of a person entering the Washington Navy Yard September 17, 2013 in Washington, DC. (Photo by Drew Angerer/Getty Images)

Washington Navy Yard Reopens 3 Days After Massacre

The Navy installation re-opened at 6 a.m. Thursday. Navy spokeswoman Lt. Cmdr. Sarah Flaherty said Thursday will be a regular work day, except for Building 197, where the shootings occurred.

09/19/2013

Police stand guard outside the home of Cathleen Alexis, the mother of Washington Navy Yard shooter Aaron Alexis, on September 17, 2013 in New York City.  (Photo by Andrew Burton/Getty Images)

Sources: Aaron Alexis Etched Messages Into Shotgun

The gunman in Monday’s Washington Navy Yard massacre left behind two short phrases etched into the side of his shotgun, sources told CBS News.

09/18/2013