Obama visits Korean border ahead of nuclear summit

US President Barack Obama looks along the border between the ROK and the DPRK from Observation Post Ouellette during a visit to the truce village of Panmunjom in the demilitarised zone (DMZ), north of Seoul, March 25, 2012. [Photo/Agencies]

US President Barack Obama poses with troops while he visits US military personnel inside a chow hall stationed at Camp Bonifas along the DMZ which borders the ROK and the DPRK, outside Seoul, March 25, 2012. [Photo/Agencies]