Two astronauts successfully installed a replacement coolant pump aboard the International Space Station Tuesday, wrapping up a high-stakes two-spacewalk repair job and clearing the way for flight controllers to re-activate a critical coolant system.
"We'd just like to say thanks to all the great folks doing all this hard work to get this space station back up and running," spacewalker Rick Mastracchio radioed as he returned to the Quest airlock module.
"No, thank you guys," astronaut Doug Wheelock replied from mission control in Houston. "It's the best Christmas ever. Thanks, guys."
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