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It appears that NASA is planning to go ahead with at least one spacewalk to replace ISS’s faulty coolant system pump.
After attempts from the inside to restart the malfunctioning cooling loop on the International Space Station failed last night, NASA mission managers have decided a spacewalk will be required to fix the problem, a source privy to NASA operations told TV20 News. NASA mission managers have scheduled the first spacewalk for Dec. 19th, according to the source, with two other spacewalks, also known as EVAs, likely to follow a few days after.
This story is not yet confirmed, but this AP article suggests it might be true.