JOINT BASE ANDREWS, Md. - A mobile medical unit from the 779th Medical Group transports a patient to the central medical location in Hangar 4 during the Joint Service Open House here May 15. The 779 MDG offers medical attention with roaming bicyclists, mobile medical units, and ambulances in case of any emergencies should occur. (U.S. Air Force photo by Staff Sgt. Renae L. Saylock)