<a href="https://en.wikipedia.org/wiki/en:Stop_sign" class="extiw" title="w:en:Stop sign">Stop sign</a> for airplane crossing at <a href="https://en.wikipedia.org/wiki/en:Frankfurt_Airport" class="extiw" title="w:en:Frankfurt Airport">Frankfurt airport</a>.  Two <a href="https://en.wikipedia.org/wiki/en:Boeing_747" class="extiw" title="w:en:Boeing 747">Boeing 747</a> of <a href="https://en.wikipedia.org/wiki/en:Lufthansa" class="extiw" title="w:en:Lufthansa">Lufthansa</a> and an <a href="https://en.wikipedia.org/wiki/en:Airbus_A330" class="extiw" title="w:en:Airbus A330">Airbus A330</a> of <a href="https://en.wikipedia.org/wiki/en:US_Airways" class="extiw" title="w:en:US Airways">US Airways</a> are visible.
<a href="//commons.wikimedia.org/wiki/User:J%C3%A9r%C3%B4me" title="User:Jérôme">Jérôme</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>