Secretary of State Hillary Rodham Clinton, Secretary Gates, Secretary of Energy Steven Chu andf Adm. Mike Mullen conduct a press conference. Secretary of State Hillary Rodham Clinton, Secretary of Defense Robert M. Gates, Secretary of Energy Steven Chu and Chairman of the Joint Chiefs of Staff Adm. Mike Mullen conduct a press conference on the new Nuclear Posture Review in the Pentagon on April 6, 2010. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 984175-Z-HDW30-677.jpg Photo Gallery