Airdate: 04/06/08 NASA is proposing to go where no man has gone before: Mars. An astronaut who survives the 700 million mile journey would face a deadly environment and a very long tour of duty: 18 months on the red planet. But first, NASA wants to test its new equipment with a return to the moon and, NASA hopes, the renaissance of a space program that no longer captures the American imagination. But is there enough funding for this ambitious program? Bob Simon reports.
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