Marines check the engine on a Humvee during Exercise Hamel at the Cultana Training Area in Australia, July 8, 2016. The Marines are assigned to Weapons Company, 1st Battalion, 1st Marine Regiment, Marine Rotational Force Darwin. Exercise Hamel is a trilateral training exercise with U.S., Australian and New Zealand forces designed to enhance cooperation, trust and friendship. Marine Corps photo by Cpl. Carlos Cruz Jr.