AMBASSADOR'S FAREWELL Deputy Defense Secretary Ashton B. Carter, left, talks with Sir Nigel Sheinwald, the U.K. Ambassador to the United States, during a meeting in Carter's Pentagon office, Dec. 22, 2011. Sheinwald, the U.K.'s ambassador to the United States since October 2007, soon will leave the post. This trip has provided Sheinwald with a chance to say farewell and to review the status of various cooperative programs jointly implemented by the two nations. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 459183-T-YBN56-045.jpg Photo Gallery