The primary goal of the journey outside the International Space Station was to hook up the new permanent cooling system. Since a tiny amount of ammonia leaked out during the first spacewalk, NASA had the astronauts take extra precautions. It could be dangerous to the astronauts if it got into the station’s air system.
This latest spacewalk lasted more than 7 hours, and brought William’s total time to 22 hours and 27 minutes. This record should get broken again in a few days when Williams heads outside again for a third and final spacewalk within 9 days on February 8th.
Original Source: NASA News Release
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