Airmen, Sailors, Soldiers and Marines training to become military working dog handlers sound off during a morning roll call on Joint Base San Antonio Lackland, Texas, April 8, 2015. Students undergo weeks of vigorous training to be able to control and operate with a canine counterpart. (U.S. Air Force photo/Senior Airman Jordan Castelan)
Senior Airman Jordan Castelan
Taken on 8 April 2015
<a rel="nofollow" class="external free" href="https://www.dvidshub.net/image/1889628">https://www.dvidshub.net/image/1889628</a>