President Barack Obama, with Major General Jeffery S. Buchanan, Commanding General U.S. Army Military District of Washington, places a wreath at the Tomb of the Unknowns on Veterans Day at Arlington National Cemetery in Arlington, Va., Nov. 11, 2013.

President Barack Obama, with Major General Jeffery S. Buchanan, Commanding General U.S. Army Military District of Washington, places a wreath at the Tomb of the Unknowns on Veterans Day at Arlington National Cemetery in Arlington, Va., Nov. 11, 2013.