Obstacles Loom in North Korea Nuclear Talks.

WASHINGTON (AP) — Even as the Bush administration marks unprecedented progress in North Korean nuclear disarmament talks, two looming impediments could undermine years of delicate negotiations.

"Chris Hill's credibility is really tied to the North Koreans coming clean on some type of uranium program," said Ralph Cossa, president of the Pacific Forum Center for Strategic and International Studies think tank. "If they don't do that, it's going to be extremely difficult" for the administration to sell the deal.

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