Bottom of First Stage of Titan IVB rocket, showing the two nozzles of the LR87 rocket engine (regarded as a single engine). Seen at the Evergreen Aviation &amp; Space Museum in McMinnville, Oregon.
<a href="//commons.wikimedia.org/wiki/User:Sf9000" title="User:Sf9000">Steven Fine</a>
<span class="int-own-work" lang="en">Own work</span>