Rick Mastracchio

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Astronauts Make Rare Christmas Eve Spacewalk

Astronauts swap in new cooling pump

(Newser) - A pair of astronauts installed a new ammonia pump on the International Space Station during a spacewalk today, in just the second Christmas Eve spacewalk in NASA's history, the AP reports. "It's like Christmas morning opening up a little present here," astronaut Rick Mastracchio said as... More »

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