Deputy Secretary William J. Lynn III welcomes British Prime Minister David Cameron to the Pentagon. Deputy Secretary of Defense William J. Lynn III (left) welcomes British Prime Minister David Cameron (right) to the Pentagon on July 21, 2010. Cameron will meet with senior military and civilian leadership of the Department of Defense to discuss a broad range of bilateral security issues. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 473138-H-FDY40-324.jpg Photo Gallery