Marines with Bridge Company, 7th Engineer Support Battalion,

Marines with Bridge Company, 7th Engineer Support Battalion, 1st Marine Logistics Group, march to their training site for a rafting exercise on the Colorado River in Laughlin, Nev., March 17-21, 2014. More than 60 Marines trained in moving heavy equipment, to include 7-tons and Humvees, across a flowing body of water using Bridge Erection Boats and an Improved Ribbon Bridge. The IRB is a multi-piece floating bridge that can function as a raft. Despite being accustomed to training in a bay with little to no current, these Marines managed to transport two 7-tons up the river at the same time.