Fire hose connection hub at the <a href="https://en.wikipedia.org/wiki/North_Carolina_School_of_Science_and_Mathematics" class="extiw" title="w:North Carolina School of Science and Mathematics">North Carolina School of Science and Mathematics</a>.
Ildar Sagdejev (<a href="//commons.wikimedia.org/wiki/User:Specious" title="User:Specious">Specious</a>)
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>