LIGHT MOMENT U.S. Defense Secretary Robert M. Gates, center right, and U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, center left, meet with U.K. Defense Secretary Liam Fox, right foreground, and Gen. Sir David Richards, U.K. chief of Defense Staff, left foreground, at the Pentagon, April 26, 2011. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 460365-U-QRQ48-751.jpg Photo Gallery