Red Arrows - Heart formation
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/48215073@N00">Santosh Puthran</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/talk2santosh/9658624594/">Red Arrows - Heart formation</a>