Tech. Sgt. Benjamin McReynolds, 28th Medical Support Squadron laboratory operations NCO in charge, places a blood specimen in a hold rack after its cycle through a chemistry analyzer in the clinical laboratory on Ellsworth Air Force Base, S.D., July 27, 2012. The lab technicians are responsible for analyzing specimens such as blood, urine and stool samples to determine the well-being of Airmen and families on Ellsworth. (U.S. Air Force photo by Airman 1st Class Kate Thornton/Released)