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" It would take an extremely large spacecraft to deflect a large asteroid that would be headed directly for the Earth. "

Rusty Schweickart

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" Americans who read the papers or watch Jay Leno have been aware for some time now that there is a slim but real possibility - about 1 in 45,000 - that an 850-foot-long asteroid called Apophis could strike Earth with catastrophic consequences on April 13, 2036. "

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