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AUDIO: Voice of John F. Kennedy: We choose

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to go to the moon in this decade and do

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the other things, not because they are easy,

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but because they are hard.

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NARRATOR: For over 50 years, NASA has

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been on the technological forefront.

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NARRATOR: But its best ideas haven't

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always come from within.

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NARRATOR: From cordless power tools to

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flexible aerogel, companies, independent

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teams, and individual inventors have

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contributed to NASA's innovation in the

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aerospace field.

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NARRATOR: That's why NASA's harnessing the

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brainpower of those companies, teams, and

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individuals with the Centennial Challenges.

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NARRATOR: With millions of dollars

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in prize purses, Centennial Challenges

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competitors have tackled everything from

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green flight technology, lunar landers,

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and astronaut gloves, to regolith

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excavation, power beaming, and personal

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air vehicles.

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NARRATOR (with conviction): But they're