U.K. PRIME MINISTER U.S. Deputy Defense Secretary William J. Lynn III, left, welcomes U.K. Prime Minister David Cameron, right, to the Pentagon, July 21, 2010. Cameron was scheduled to meet with the Defense Department's senior military and civilian leaders to discuss a broad range of bilateral security issues. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 301799-X-XTV40-390.jpg Photo Gallery