NEW TREATY President Barack Obama signs the new strategic arms reduction treaty with Russia in the White House's Oval Office in Washington, D.C., Feb. 2, 2011. Defense leaders who participated in the signing included Defense Secretary Robert M. Gates, third from left, and Navy Adm. Mike Mullen, far left, chairman of the Joint Chiefs of Staff. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 008966-C-VNI80-435.jpg Photo Gallery