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

CNN: Don't be afraid, Seoul's message to tourists

"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.

CNN: Stops and Starts

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

WSJ: China Seeks Peacemaker Role on North Korea