A mortar explodes out of the expeditionary fire support M327 120mm towed mortar system, as Marines with Fox Battery, 2nd Battalion, 12th Marine Regiment, 2nd Marine Division practice a call-for-fire training mission aboard Marine Corps Base, Camp Lejeune, N.C., Feb.17, 2010. The unit is third in the Marine Corps to qualify on the system, preparing them for their upcoming attachment to the 26th Marine Expeditionary Unit this fall. - A mortar explodes out of the expeditionary fire support M327 120mm towed mortar system, as Marines with Fox Battery, 2nd Battalion, 12th Marine Regiment, 2nd Marine Division practice a call-for-fire training mission aboard Marine Corps Base, Camp Lejeune, N.C., Feb.17, 2010. The unit is third in the Marine Corps to qualify on the system, preparing them for their upcoming attachment to the 26th Marine Expeditionary Unit this fall.