Elizabeth Holzbaur blood donor
U.S. Air Force Master Sgt. Elizabeth Holzbaur, an auto flight instrument and navigation craftsman with the 315th Aircraft Maintenance Squadron, was all smiles for a mobile upload to facebook while she donated blood to the American Red Cross at the Sports and Fitness Center June 23, 2010, at Charleston Air Force Base, S.C (U.S. Air Force photo/Tech. Sgt. Mike Kiker)