A soldier with the Army’s 3rd Infantry Regiment, “The Old Guard,” keeps a constant vigil over the casket of Army Cpl. Frank Woodruff Buckles, the last U.S. World War I veteran, as he laid in repose before his burial March 15, 2011, at Arlington National Cemetery. A gold-leafed “Winged Victory” figure presented to President Warren G. Harding when the unknown soldier of World War I was buried at Arlington on Nov. 11, 1921 watches over Mr. Buckles’ casket. (Defense Department photo/Donna Miles)