Blood Work
Senior Airman Lance Gillenwater, 28th Medical Support Squadron medical laboratory technician, examines a smeared blood slide in the clinical laboratory at Ellsworth Air Force Base, S.D., April 19, 2013. The stain makes it easier to tell the difference between blood cells, problem cells and parasites, producing faster and more accurate results. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)