PENTAGON BRIEFING Chief of Naval Operations Navy Adm. Jonathan W. Greenert and Navy Adm. John Richardson, director of the Naval Nuclear Propulsion Program, brief reporters at the Pentagon, Feb. 4, 2014, on the Navy's investigation into allegations of compromised test materials. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 630785-Z-QYZ91-233.jpg Photo Gallery