In 1953, Operation "Big Switch" was under way as prisoners taken during the Korean conflict were exchanged at Panmunjom.

CNN: Monday,

Meanwhile, South Korea said the North appeared to have cut the inter-Korean phone link at the border village of Panmunjom, through which the two sides communicate on issues along the border.

WSJ: North Korea Declares War Truce 'Invalid'

Separately, South Korea said the North appeared to have cut the inter-Korean phone link at the border village of Panmunjom, through which the two sides communicate on issues along the border.

WSJ: Pressure Rises on Korean Peninsula

Since the end of the war, only a few people have crossed the line at Panmunjom, the so-called joint-security area and the only place where barbed wire and mines are absent.

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