Marines from Marine Wing Support Squadron 274 work together to unload and spread 1,500 90-pound bags of concrete mix. The Marines were completely caked in concrete powder by the end of the day. The Marines are using the conrete to stablizine the soile before reconstructing the expeditionary airfield used as a refueling point at Camp Dwyer. - Marines from Marine Wing Support Squadron 274 work together to unload and spread 1,500 90-pound bags of concrete mix. The Marines were completely caked in concrete powder by the end of the day. The Marines are using the conrete to stablizine the soile before reconstructing the expeditionary airfield used as a refueling point at Camp Dwyer.