U.S. Air Force Airman 1st Class Chris Lawson, 20th Medical Support Squadron lab technician, places a drop of blood on a slide in the medical clinic at Shaw Air Force Base, South Carolina, Dec. 9, 2019. Lawson allowed the slide to dry before staining with different colors to make components such as white and red blood cells stand out from each other. (U.S. Air Force photo by Senior Airman Kathryn R.C. Reaves)