Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, delivers remarks commemorating the 50th anniversary of the Vietnam War at the Vietnam Veterans Memorial, Washington, D.C., May 28, 2012.

Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, delivers remarks commemorating the 50th anniversary of the Vietnam War at the Vietnam Veterans Memorial, Washington, D.C., May 28, 2012.