Two Caterpillar Challenger machines at Williams Field in Antarctica parked while grooming the snow runway.
Timothy Smith - <a href="//commons.wikimedia.org/w/index.php?title=User:Tas50&amp;action=edit&amp;redlink=1" class="new" title="User:Tas50 (page does not exist)">Tas50</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>