Astronauts Mike Hopkins and Rich Mastracchio successfully repaired a cooling system on the International Space Station. The fix – replacing a broken cooling pump for a new one -- took more than ... more 
Astronauts Mike Hopkins and Rich Mastracchio successfully repaired a cooling system on the International Space Station. The fix – replacing a broken cooling pump for a new one -- took more than seven hours to complete, but intial testing shows the new mechanism is working. Bill Whitaker reports. less 
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Tue, Dec 24, 2013 9:40 PM EST