This is a photo of the tertiary engine on a KC-10 Extender, this one is operated by the Royal Netherlands Airforce. Photographed at RIAT 2013, UK.
<a href="//commons.wikimedia.org/w/index.php?title=User:PiggiusMax&amp;action=edit&amp;redlink=1" class="new" title="User:PiggiusMax (page does not exist)">PiggiusMax</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>