An M1A1 Abrams tank sits on an M17 floating raft, which is used to carry vehicles and troops over small bodies of water, during a training exercise conducted by Bridge Company, 8th Engineer Support Battalion, 2nd Marine Logistics Group, on the morning of Sept. 4, 2014, aboard Marine Corps Base Camp Lejeune, N.C. The raft was towed and guided by two Mach 3 Bridge Erection Boats, carrying approximately 140 tons across New River.