Lance Cpl. Daniel Derry, combat engineer, Combat Logistics Battalion 24, surveys the perimeter of the humanitarian assistance campsite before securing it with a roll of Constantine wire on Fort Pickett, Va., Sept. 2. In a matter of hours, the Marines transformed the open field into a secure area able to support 300 refugees. The unit is training for its deployment as the logistical supporting element of the 24th Marine Expeditionary Unit. - Lance Cpl. Daniel Derry, combat engineer, Combat Logistics Battalion 24, surveys the perimeter of the humanitarian assistance campsite before securing it with a roll of Constantine wire on Fort Pickett, Va., Sept. 2. In a matter of hours, the Marines transformed the open field into a secure area able to support 300 refugees. The unit is training for its deployment as the logistical supporting element of the 24th Marine Expeditionary Unit.