President Barack Obama and First Lady Michelle Obama at the Vietnam Veterans Memorial wall (May 28, 2012)

President Barack Obama and First Lady Michelle Obama are joined at the Vietnam Veterans Memorial wall by Rose Marie Sabo-Brown, the widow of Medal of Honor recipient Specialist Leslie H. Sabo, Jr., U.S. Army, during the 50th Anniversary of the Vietnam War commemoration ceremony in Washington, D.C., May 28, 2012. (Official White House Photo by Pete Souza)