STS-109 crew members <a href="https://en.wikipedia.org/wiki/John_M._Grunsfeld" class="extiw" title="en:John M. Grunsfeld">John M. Grunsfeld</a> and <a href="https://en.wikipedia.org/wiki/Richard_M._Linnehan" class="extiw" title="en:Richard M. Linnehan">Richard M. Linnehan</a> perform work on Hubble's NICMOS cooling system.
NASA
<a rel="nofollow" class="external text" href="https://web.archive.org/web/20111016190201/http://hubble.nasa.gov/ncs-story/event-14.php">http://hubble.nasa.gov/ncs-story/event-14.php</a>