Aerial photos made from low-flying unarmed U.S. Air Force jet reconnaissance planes revealed these barracks-type structures near Chiktong in North Korea, which are believed to house enemy-held UN war prisoners. This enlarged section shows soldiers, some waving, others just looking at the aircraft overhead. Their true identity is a mystery. Structures show no markings which Communist officials promised to use on all camps housing prisoners of war., ca. 03/1952