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KNOXVILLE, Tenn. (AP) — A University of Tennessee professor charged with hiding his relationship with a Chinese university to get research grants from a federal agency filed multiple reports with the school detailing his ties, according to court testimony.

The United States has for decades enjoyed a mutually beneficial relationship with Russia that has often served as a powerful symbol of cooperation between the East and West in the post-Cold War era. But that cooperation could soon dissolve, and it has NASA's new chief, Bill Nelson, concerned.

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When astronauts venture outside of the International Space Station to go on spacewalks, the most important thing they have to do is focus.

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