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NASA astronauts conduct spacewalk to upgrade ISS
From the Watch Now: Elephants enjoy the snowfall in Arizona, and more of today's top videos series
NASA astronauts have begun a spacewalk Wednesday on the International Space Station. They're working to finish installing a European science platform and complete long-term battery upgrade work. Astronaut Mike Hopkins can be seen in the spacesuit with red stripes, joined by Victor Glover.
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Watch elephants at a zoo in Tucson run and play in some rare snow, NASA astronauts began a s…
