The U.S. and South Korea seem to be at odds as the July 25 North-South summit approaches. South Korea wants to try to open up economic relations with the North. The aim would be to give Pyongyang a stake in keeping the peace and to carve out an exclusive economic preserve for the South's companies. Seoul is mulling offering limited investment in the North's Tumen River free-trade zone as well as jobs for North Koreans on big projects and tourism. But the U.S. seems to want to keep pressure on the North to back down on its nuclear program. Strains with Washington could grow if the summit actually happens and Seoul tries to open a new chapter with the North.

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