U.S. Air Force Capt. Lucy Knippenburg, Langley dental resident, listens to U.S. Navy Lt. Cmdr. Robert Ruehrwein, Little Creek Boone Clinic dental officer, explain her assignment during a dental forensics training course at Langley Air Force Base, Va., June 5, 2015. Three U.S. Navy dental officers and U.S. Navy Capt. Kevin Torske, Naval Medical Center Portsmouth staff pathologist, trained U.S. Air Force and Navy dental residents on the principles of forensic dentistry. (U.S. Air Force photo by Airman 1st Class Devin S. Michaels/Released)