445th ASTS tour USAF Hospital Langley
U.S. Air Force Reserve Staff Sgt. Isaac Maraspini, 445th Aeromedical Staging Squadron biomedical equipment craftsman, and Senior Airman Ryan Walker, 445th ASTS biomedical equipment technician, test a pacemaker during their tour of USAF Hospital Langley at Langley Air Force Base, Va., July 21, 2014. During their tour, the Reservists completed biannual refresher training to remain mission-qualified. (U.S. Air Force photo by Airman 1st Class Devin Scott Michaels/Released)