Pakistan: Is a Nuclear Power Becoming a Failed State?

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Detectives from Scotland Yard will help Pakistan investigate the killing of Benazir Bhutto, but can they give President Pervez Musharraf much-needed credibility? Can free elections promote national unity? Is a nuclear power on the way to disintegration? Also, more post-election violence today in Kenya, and Democrats and Republicans caucus tonight in Iowa, then it's on to New Hampshire next Tuesday. We get a preview.

Photo: Arif Ali/AFP/Getty Images