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Astronauts Successfully Install Pump During Second Spacewalk

Astronauts on the International Space Station completed a 7 and a half hour spacewalk to repair a faulty cooling line. It is the second spacewalk in as many days to address the problem, and the U.S. space agency NASA said two should be enough. Today, they are installed a new ammonia pump, NASA said. Astronauts Rick Mastracchio and Michael Hopkins removed the faulty pump Saturday. This second spacewalk was originally scheduled for yesterday, but the astronauts had to swap...

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