U.S. Marines with Weapons Company, 1st Battalion, 1st Marine Regiment, Marine Rotational Force - Darwin, stop to fix a flat tire at Cultana Training Area, South Australia, Australia, July 1, 2016. The difficult terrain challenges Australian, New Zealand, and U.S. forces during Exercise Hamel, a trilateral training exercise to enhance cooperation, trust, and friendship. Photo by Mandaline Hatch/U.S. Marine Corps/UPI - Stock Photo