181105-M-BY300-1248 FOSSMOAN, Norway (Nov. 5, 2018) U.S. Navy Cmdr. James Palma, right, assigned to 2nd Medical Battalion, 2nd Marine Logistics Group-Forward, teaches corpsmen to locate veins with an ultrasound machine at a combat service support area (CSSA) in Fossmoan, Norway, Nov. 5, 2018. The corpsmen learned to use an M-Turbo ultrasound machine to find difficult-to-locate veins in patients during Exercise Trident Juncture 18. The exercise enhances the U.S. and NATO Allies’ and partners’ abilities to work together collectively to conduct military operations under challenging conditions. (U.S. Marine Corps photo by Sgt. Bethanie C. Sahms/Released)