PENTAGON BRIEFING Defense Secretary Chuck Hagel delivers remarks as Navy Secretary Ray Mabus looks during a briefing at the Pentagon, March 18, 2014. Hagel and Mabus addressed plans to implement changes following the Washington Navy Yard shooting investigations and reviews. During the Sept. 16, 2013, shooting, a civilian contractor killed 12 employees and wounded several others at the Naval Sea Systems Command headquarters building before being killed by police. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 210493-U-GHR56-361.jpg Photo Gallery