Jet Blast warning sign at the Royal Victoria Dock in the Docklands, London, England.
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/rjw1/">bob walker</a> on Flickr
<a rel="nofollow" class="external free" href="https://www.flickr.com/photos/rjw1/14917347425/">https://www.flickr.com/photos/rjw1/14917347425/</a>