Obama scans tense Korean DMZ; North mourns Kim Jong-il

CAMP BONIFAS, South Korea - US President Barack Obama peered across South Korea's tense border with the North on Sunday in a show of solidarity with US ally Seoul and a message of resolve to Pyongyang's new young ruler in his country's nuclear standoff with the West.
Arriving on the eve of a global summit on nuclear security hosted by South Korea, Obama flew by helicopter to a US base on the edge of the Demilitarized Zone (DMZ) as a solemn North Korea came to a halt to mark the 100th day after "dear leader" Kim Jong-il's death.
"You guys are at freedom's frontier," Obama told about 50 troops crammed into the Camp Bonifas mess at one of the world's most heavily fortified frontiers.
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