The Experts

In this handout photo provided by the FBI, Aaron Alexis is shown in a photo prior to the mass shooting at the Washington Navy Yard on September 16, 2013 in Washington, D.C. Authorities believe Alexis was a gunman involved in the shootings at the Navy Yard, where at least 12 people were shot and killed. (Photo by FBI via Getty Images)

Report: Navy Yard Shooter Began Working At Military Installation Last Week

The gunman who killed 12 people at the Washington Navy Yard reportedly just started working there last week.