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President Barack Obama is reflected in the Vietnam Veterans Memorial wall as he delivers remarks during the 50th Anniversary of the Vietnam War commemoration ceremony in Washington, D.C., May 28, 2012. (Official White House Photo by Pete Souza)

President Barack Obama is reflected in the Vietnam Veterans Memorial wall as he delivers remarks during the 50th Anniversary of the Vietnam War commemoration ceremony in Washington, D.C., May 28, 2012. (Official White House Photo by Pete Souza)