Engineers from Bridge Company, 7th Engineer Support Battalion, 1st Marine Logistics Group and 1st Combat Engineer Battalion, 1st Marine Division as well as members of British 54 Commando Squadron Royal Engineers stand atop a medium girder bridge they built at Marine Corps Base Camp Pendleton, Calif., Sept. 23, 2015. Marines from 7th ESB and 1st CEB are conducting various engineer training events alongside their British counterparts in coming weeks as part of annual large-scale exercise Black Alligator. - Engineers from Bridge Company, 7th Engineer Support Battalion, 1st Marine Logistics Group and 1st Combat Engineer Battalion, 1st Marine Division as well as members of British 54 Commando Squadron Royal Engineers stand atop a medium girder bridge they built at Marine Corps Base Camp Pendleton, Calif., Sept. 23, 2015. Marines from 7th ESB and 1st CEB are conducting various engineer training events alongside their British counterparts in coming weeks as part of annual large-scale exercise Black Alligator.