U.S. Air Force Staff Sgt. Maranda Oliver, 633rd Medical Operations Squadron Pulmonary Clinic NCO in charge, listens to Nyemia Heyward’s lungs with a stethoscope, at Langley Air Force Base, Va., March 6, 2012. The pulmonary clinic brings specialized care to patients at USAF Hospital Langley. (U.S. Air Force photo by Airman 1st Class Teresa Cleveland/Released)