<a href="//commons.wikimedia.org/wiki/Caterpillar_D9" title="Caterpillar D9">CAT D9</a>L <a href="//commons.wikimedia.org/wiki/Bulldozer" title="Bulldozer">bulldozer</a> and Volvo BM A 258
<a href="//commons.wikimedia.org/wiki/User:MathKnight" title="User:MathKnight">MathKnight</a>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>