Third Spacewalk to Fix Coolant Pump Underway
International Space Station (ISS) astronauts Wheelock and Caldwell Dyson are outside the space station again on their third spacewalk to repair the cooling system. A coolant pump failed on July 31 and the intrepid spacewalkers have been working to fix it. During the first two spacewalks they removed the failed pump and today they are installing the new one. Follow the action on NASA TV or get updates on NASA’s ISS website.
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