U.S. Army Sgt. Valeria Melton, McDonald Army Health Center NCO in charge of internal medicine, trains Spc. Heaith Howe, McDonald Army Health Center radiology specialist, on how to do an IV at Joint Base Langley-Eustis, Virginia, Feb. 5, 2019. Before enlisting Melton practiced as an emergency medical technician for two years. (U.S. Air Force photo by Senior Airman Tristan Biese)