Air Force Capt. (Dr.) Kjell Ballard, emergency room resident, asks a patient to make the OK sign to check mobility of the fingers at the San Antonio Military Medical Center on Joint Base San Antonio-Fort Sam Houston, Texas. As the third largest medical group in the Air Force Medical Service, the 959th MDG is integrated with more than 6,000 Army and civilian personnel supporting operations at a 425-bed facility and the only Level 1 Trauma Center in the Department of Defense. (U.S. Air Force photo/Staff Sgt. Kevin Iinuma)