U.S. Marine Corps Lance Cpl. Kaleb Britton, a gunner with Echo Company, Battalion Landing Team, 2nd Battalion, 4th Marine Regiment, 31st Marine Expeditionary Unit, provides security Sept. 4, 2013, during a live-fire training exercise as part of Koolendong 2013 at the Bradshaw Field Training Area in Northern Territory, Australia.
Koolendong is an amphibious and live-fire exercise designed to increase interoperability between the U.S. Marine Corps and Australian Defense Force. (DoD photo by Cpl. Michael Oxton, U.S. Marine Corps/Released). Original public domain image from Flickr