Lance Cpl. Eric Lesemann (left) and Cpl. Emily Warfield, combat engineers, Engineer Company, 8th Engineer Support Battalion, 1st Marine Logistics Group (Forward), set up a Concertina-wire perimeter outside of Patrol Base Eredvi, Afghanistan, July 3. The Marines spent more than 18,000 man hours working on the expansion of the PB. - Lance Cpl. Eric Lesemann (left) and Cpl. Emily Warfield, combat engineers, Engineer Company, 8th Engineer Support Battalion, 1st Marine Logistics Group (Forward), set up a Concertina-wire perimeter outside of Patrol Base Eredvi, Afghanistan, July 3. The Marines spent more than 18,000 man hours working on the expansion of the PB.