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  • NASA astronauts tackle urgent spacewalking repairsadd to reading list  

    Posted on December 21, 2013 at 12:14 PM

    Updated Saturday, Dec 21 at 7:31 PM

    Astronauts removed an old space station pump Saturday, sailing through the first of a series of urgent repair spacewalks to revive a crippled cooling line.

    By MARCIA DUNN / The Associated Press
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