A "citation needed" sign at the <a href="https://en.wikipedia.org/wiki/March_for_Science" class="extiw" title="w:March for Science">March for Science</a> in San Francisco, California.
<a href="//commons.wikimedia.org/wiki/User:DarTar" title="User:DarTar">DarTar</a>
<span class="int-own-work" lang="en">Own work</span>