Marines with Marine Wing Support Squadron 374, keep watch from a tower at the Combat Center Expeditionary Air Field during the unit’s Integrated Training Exercise, Wednesday. The Marines learned how to effectively defend their air base by improving patrol and watch procedures. - Marines with Marine Wing Support Squadron 374, keep watch from a tower at the Combat Center Expeditionary Air Field during the unit’s Integrated Training Exercise, Wednesday. The Marines learned how to effectively defend their air base by improving patrol and watch procedures.