Astronauts breeze through their 3rd spacewalk (AP)

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Astronauts breeze through their 3rd spacewalk
    (AP)

 


<p>You are not allowed to view links. Register or LoginAP - Shuttle Discovery's astronauts breezed through their third and final spacewalk Sunday, replacing an empty gas tank at the international space station and collecting a sample of dusty debris.</p><br clear="all"/>


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