The <i>gadget</i> in the <a href="//commons.wikimedia.org/wiki/Trinity_test" title="Trinity test">Trinity Test Site</a> tower awaiting detonation. <a href="https://en.wikipedia.org/wiki/Norris_Bradbury" class="extiw" title="w:Norris Bradbury">Norris Bradbury</a> is on the left, <a href="https://en.wikipedia.org/wiki/Boyce_McDaniel" class="extiw" title="w:Boyce McDaniel">Boyce McDaniel</a> on the right.
<a href="//commons.wikimedia.org/wiki/Los_Alamos_National_Laboratory" title="Los Alamos National Laboratory">Los Alamos National Laboratory</a>
Attribution
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/departmentofenergy/10540205205/">HD.4G.054</a>