ANSWERING QUESTIONS Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, at podium, Defense Secretary Robert M. Gates, left, and Secretary of State Hillary Rodham Clinton, right, conduct a press conference on the new Nuclear Posture Review at the Pentagon, April 6, 2010. SHARE IMAGE: Download Image: Full Size (0.05 MB) Photo By: VIRIN: 817121-M-GXB09-091.jpg Photo Gallery