June 4, 2008 2:20 PM

China likely to beat U.S. back to the moon, NASA says

The goal of NASA's Constellation program is to return astronauts to the moon by 2020. The head of NASA's moon program says Chinese astronauts are on schedule to beat that goal by two or three years. The Chinese lead will be even longer if the American schedule slips, as some space experts predict.

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