Astronauts try to reassure their families

Safety for Wednesday's space shuttle launch is especially important to the four parents among the first crew to go into space since the Columbia tragedy.

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<p><a href="http://www.physorg.com/news5065.html">Astronauts try to reassure their families</a></p> <p>Safety for Wednesday's space shuttle launch is especially important to the four parents among the first crew to go into space since the Columbia tragedy. </p>