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U.S. Aviation Ordnance Marines with Marine Aviation Logistics Squadron12 prepare ordnance for aviation squadrons participating in Valiant Shield 16 at Andersen Air Force Base, Guam, September 12, 2016. The ordnance constructed, provided the Marines of MALS-12 valuable experience assembling live ordnance to be used during VS16 for a sinking exercise. VS16 is a biennial U.S. only, field training exercise that focuses on joint training with U.S. Navy, Air Force and Marine Corps to increase interoperability and working relationships.