Astronauts step out for longest, hardest spacewalk

(AP) -- Astronauts stepped out for the longest and hardest spacewalk of their mission Saturday to wrap up greasy repair work on a gummed-up joint at the international space station.

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<p><a href="http://www.physorg.com/news146582451.html">Astronauts step out for longest, hardest spacewalk</a></p> <p>(AP) -- Astronauts stepped out for the longest and hardest spacewalk of their mission Saturday to wrap up greasy repair work on a gummed-up joint at the international space station.</p>