PRESS CONFERENCE Defense Secretary Robert M. Gates, second left, Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, far left, Secretary of State Hillary Clinton and Energy Secretary Steven Chu, far right, conduct a press conference to discuss the Nuclear Posture Review at the Pentagon, April 6, 2010. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 018273-B-CLZ87-097.jpg Photo Gallery