Landing support specialist Marines prepare slings during external lift training in support of exercise Northern Viper 17 at Draughon Range near Misawa Air Base, Japan, Aug. 21, 2017. The combined-joint exercise is held to enhance regional cooperation between participating nations to collectively deter security threats. The Marines are assigned to Combat Logistics Battalion 4, Combat Logistics Regiment 3, 3rd Marine Logistic Group. Marine Corps photo by Lance Cpl. Andy Martinez