<a href="https://en.wikipedia.org/wiki/Ironworker" class="extiw" title="en:Ironworker">Ironworkers</a> surprised by photographer, while erecting the steel frame of a new building, at the <a href="https://en.wikipedia.org/wiki/Massachusetts_General_Hospital" class="extiw" title="en:Massachusetts General Hospital">Massachusetts General Hospital</a>, <a href="//commons.wikimedia.org/wiki/USA" class="mw-redirect" title="USA">USA</a>.
photo taken by flickr <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/pkeleher/">Paul Keheler</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/pkeleher/250015747/">flickr</a>