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- NATION, Page 25Grapevine
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- OUTER SPACE TRIAL BALLOON. NASA is under pressure to
- consider cheaper alternatives to its $400 billion plan for a
- manned mission to Mars. Engineers at the Livermore Laboratory
- in California say stations on the moon, and later on Mars,
- could be built out of inflatable plastic balloons for only $10
- billion. The idea could be punctured by a big drawback: a
- 1-in-10 chance that the balloons could burst.
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