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An East German soldier helps a boy over the barbed wire on the East-West border. After this, the soldier was replaced and his fate is unknown.

Dog tags of the more than 58,000 service men and women who died in the Vietnam War hang from the ceiling of the National Vietnam Veterans Art Museum in Chicago. The 10-by-40-foot sculpture, entitled Above and Beyond, was designed by Ned Broderick and Richard Stein. The tens of thousands of metal dog tags are suspended 24 feet in the air, 1 inch apart, from fine lines that allow them to move and chime with shifting air currents.