Navy Yard Tragedy Draws Attention to Facility Security

Aired: 9/17/2013 | 0:08:45 | Clip
While Washington mourned the 12 victims of the Navy Yard shooting, authorities released new details about the shooter, Aaron Alexis. The Defense Department contractor had had run-ins with the law and sought help for mental health issues. Ernesto Londoño of The Washington Post joins Gwen Ifill to update the developing portrait.