LANGLEY AIR FORCE BASE, Va. -- Brig. Gen. (Dr.) Byron Hepburn, Commander, Air Force Medical Support Agency, Washington, D.C., speaks about aeromedical evacuations while providing an overview of the Air Force medical service to medical students April 22. The students are studying at Eastern Virginia Medical School in Norfolk, Va. (U.S. Air Force photo/Tech. Sgt. Levi Collins)