CAMP LEATHERNECK, Helmand province, Afghanistan -- Royal Air Force Sgt. Stuart McCaig, a 29-year-old tactical air director, tracks aircraft on a monitor. The native of Bothwell, Glasgow, Scotland, is one of several United Kingdom members who work with United States Marines in the Regional Command (Southwest) Direct Air Support Center. The DASC is a key element in managing and coordinating military aircraft in Southwest Afghanistan, particularly in support of ground combat units. The combined team allows the DASC to communicate easily with coalition pilots.