Described as the last best hope for Darfur, the region's peace settlement is thrown into question by officials who worry over Sudan's instability and refugees who have little faith in the government. Margaret Warner reports from Sudan on the obstacles…

Apr 14

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Chad dissolved diplomatic relations with neighboring country Sudan on Friday and threatened to expel some 200,000 Sudanese refugees -- blaming the Sudanese government for supporting a rebel attack in the Chadian capital that killed 350 people.