Wednesday, August 11, 2010

Third spacewalk delayed; fourth will be needed
[ Thu, 12 Aug 2010 02:38:05 GMT ]

Spacewalker Doug Wheelock, in the center of the frame, moves the failed ammonia coolant pump module on the International Space Station's S1 truss while spacewalker Tracy Caldwell Dyson works off to the right.Spacewalking astronauts relied on brute force Wednesday to remove a broken coolant pump that has hampered operations at the International Space Station.  A third spacewalk will be delayed and a fourth is needed, NASA says.


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