This past weekend at Imjingak, an area within the Demilitarized Zone (DMZ) popular with tourists, business appeared down only slightly.

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Earlier on Sunday, Mr Obama visited some of the US personnel based at the the heavily fortified Demilitarised Zone (DMZ) which separates the two Koreas.

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"I remember when only a handful of people came, " says Tran Hong Chi, a guide for the somewhat grisly tours into the Demilitarized Zone or DMZ, a heavily bombed and severely poisoned territory that served as the boundary between north and south Vietnam.

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Mr. Obama will also visit the inter-Korean border known as the demilitarized zone, or DMZ, which every president has done since Ronald Reagan.

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