Secretary of Defense Robert Gates and Secretary of State Hillary Clinton, left, look through binoculars toward North Korea during a visit to observation post Ouellette at the Demilitarized Zone in Panmunjon, South Korea, on July 21, 2010. The DMZ is a strip of land that divides North and South Korea at the 38th parallel. (AP Photo/Mark Wilson, pool)

Photo by: Mark Wilson

Secretary of Defense Robert Gates and Secretary of State Hillary Clinton, left, look through binoculars toward North Korea during a visit to observation post Ouellette at the Demilitarized Zone in Panmunjon, South Korea, on July 21, 2010. The DMZ is a strip of land that divides North and South Korea at the 38th parallel. (AP Photo/Mark Wilson, pool)