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Add Yahoo as a preferred source to see more of our stories on Google. The space shuttle Discovery arrives for its final destination at the Smithsonian's Udvar-Hazy Center in 2012. The aircraft used to ...

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(AP) -- NASA celebrated 10 years of continuous human presence at the International Space Station on Tuesday while readying shuttle Discovery for one last trip into orbit.

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(AP) -- NASA celebrated 10 years of continuous human presence at the International Space Station on Tuesday while readying shuttle Discovery for one last trip into orbit.