Secretary of Defense Robert M. Gates and President Barack Obama salute as the U.S. Army Old Guard Fife and Drum Corps

Secretary of Defense Robert M. Gates and President Barack Obama salute as the U.S. Army Old Guard Fife and Drum Corps march past during the Armed Forces Farewell Tribute in honor of Secretary Gates at the Pentagon in Arlington, Virginia, June 30, 2011. (Official White House Photo by Samantha Appleton)