After taking steps on Saturday to repair a malfunctioning pump module for the International Space Station, as my colleague, Kenneth Chang reported, two NASA astronauts returned for a spacewalk Tuesday to finish the job.
The Christmas Eve spacewalk by astronauts, Col. Michael S. Hopkins of the Air Force and Richard A. Mastracchio, is expected to allow them to complete the repair to the cooling system. NASA provided a live video and audio feed of the spacewalk on Tuesday and regular updates on Twitter.
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