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NASA Regroups, Unveils New Safety Procedures

NASA has not launched a space shuttle since the Columbia disaster a year and a half ago. After revamping its shuttle program, the agency is preparing to return to space next spring, when the 20-year-old shuttle Discovery is slated to launch a Mercury probe.

Kennedy Space Center officials gave a recent tour of preparations for the mission, including new safety standards. NPR's Richard Harris reports.

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