Robert Lightfoot director of NASA s Marshall Space Flight Center

<p>Robert Lightfoot director of NASA s Marshall Space Flight Center in Huntsville Ala discusses President Obama s decision to shelve the Constellation moon program in this photograph taken Tuesday Feb 2 2010 < p>

<p>Robert Lightfoot director of NASA s Marshall Space Flight Center in Huntsville Ala discusses President Obama s decision to shelve the Constellation moon program in this photograph taken Tuesday Feb 2 2010 < p>

<p>Robert Lightfoot director of NASA s Marshall Space Flight Center in Huntsville Ala discusses President Obama s decision to shelve the Constellation moon program in this photograph taken Tuesday Feb 2 2010 < p>