Blood work
Staff Sgt. Toni Thompson looks into a microscope, viewing red and white blood cells magnified at 100 times their original size March 4 at Eielson Air Force Base, Alaska. The purpose of the examination is to ensure the blood contains no disease or infection. Sergeant Thompson is a 354th Medical Group clinical lab technician. (U.S. Air Force photo/Airman 1st Class Laura Max)