Control panel for the Wright Brothers wind tunnel on the campus of the Massachusetts Institute of Technology, November 2017. The tunnel was first constructed in 1938; in 2017, it was announced that this tunnel would be dismantled and a new tunnel constructed in its place. This picture was taken during a tunnel open house.
<a href="//commons.wikimedia.org/wiki/User:Phoebe" title="User:Phoebe">Phoebe</a>
<span class="int-own-work" lang="en">Own work</span>