U.S. Air Force Staff Sgt. Walter Towers, 8th Expeditionary Air Mobility Squadron (EAMS) ramp supervisor and native of Vega Baja, Puerto Rico, directs a vehicle operator backing up a generator prior to loading in a U.S. Air Force C-17 Globemaster III cargo aircraft Feb. 11, 2012. Airmen from the 8th EAMS ramp section are trained to load all types of cargo onto aircraft. (U.S. Air Force photo by Staff Sgt. Nathanael Callon)