In this Oct. 1, 2010, file photo, a South Korean worker watches a TV news program showing North Korean leader Kim Jong-il's third son Kim Jong-un as she waits to head to the North Korean city of Kaesong at the customs, immigration and quarantine office for North Korea near the Demilitarized Zone (DMZ) of Panmunjom in Paju, South Korea. (AP Photo/Ahn Young-joon, File)

Photo by: Ahn Young-joon

In this Oct. 1, 2010, file photo, a South Korean worker watches a TV news program showing North Korean leader Kim Jong-il's third son Kim Jong-un as she waits to head to the North Korean city of Kaesong at the customs, immigration and quarantine office for North Korea near the Demilitarized Zone (DMZ) of Panmunjom in Paju, South Korea. (AP Photo/Ahn Young-joon, File)