U.S. Air Force Maj. Melissa Fisher, 633rd Dental Squadron maxillofacial surgeon, performs a vertical mattress suture on a cow tongue in the USAF Hospital Langley dental clinic at Langley Air Force Base, Va., Sep. 25, 2014. The dental residents learned the vertical mattress suture, which typically allows for a more even scar to form. (U.S. Air Force photo by Airman 1st Class Devin Scott Michaels)