A picture of a mockup of the <a href="https://en.wikipedia.org/wiki/Fat_Man" class="extiw" title="en:Fat Man">Fat Man</a> nuclear device
<a rel="nofollow" class="external free" href="http://www.dtra.mil/press_resources/photo_library/CS/CS-2.cfm">http://www.dtra.mil/press_resources/photo_library/CS/CS-2.cfm</a>