Astronaut Mike Massimino, STS-125 mission specialist, practices repairing Hubble Space Telescope hardware during a training session at NASA's Johnson Space Center.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/144614754@N02">NASA Hubble Space Telescope</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/nasahubble/27412543614/">Mike Massimino</a>