Marines with Motor Transportation Services Company, Combat Logistics Battalion 25, Combat Logistics Regiment 45, practice searching a water-fording navigation course at Camp Lejeune, North Carolina, Aug. 13, 2014, during exercise Heavy Metal 14. The Marines used a human chain in case the lead Marine became stuck, the others could pull him out. The lead Marine used a stick as an improvised measuring tool, to judge whether the fording area was safe for the next step.