A North Korean soldier marches on the north side of the truce village of Panmunjom in the demilitarised zone separating the two Koreas in Paju, about 55 km (34 miles) north of Seoul, November 10, 2009. The two Koreas had a brief naval skirmish in Yellow Sea waters on Tuesday, but there were no casualties in the incident that came just ahead of a visit to Asia by U.S. President Barack Obama, Yonhap news agency reported.