Capt. Sarah Freidel, 34th Bomb Squadron flight surgeon, analyzes Staff Sgt. Jacob Appleby, 28th Medical Operations Squadron ambulance services technician, while he performs exercises during a physical exam in the flight medicine clinic on Ellsworth Air Force Base, S.D., May 2, 2012. Various tests are performed during the exam to ensure that all of the Airmen assessed are able and ready to perform their highly-stressful duties. (U.S. Air Force photo by Airman 1st Class Kate Thornton/Released)