March 21st, 2012
01:25 AM ET
President Barack Obama is scheduled to visit the demilitarized zone that splits the Korean Peninsula in two for the first time on Sunday.
His planned visit to the heavily fortified border is part of a three-day trip to South Korea to participate in a summit meeting about nuclear security in Seoul.
Top officials from 54 countries including China and Russia will attend the summit meeting next week, but its message of international cooperation has been overshadowed by North Korea's announcement last week that it is planning to carry out a rocket-powered satellite launch in April.FULL STORY
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