Senior Airman Lance Gillenwater, 28th Medical Support Squadron medical laboratory technician, observes blood under a microscope in the clinical laboratory at Ellsworth Air Force Base, S.D., April 19, 2013. Lab technicians are responsible for analyzing specimens from patients to assist physicians as they assess the health of Airmen and their families on Ellsworth. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)