Airman 1st Class Devin Hewitt, 28th Operations Support Squadron aircrew flight equipment apprentice, uses an air hose to test the reliability of an inflation cell for a life preserver unit here, June 25. Airman Hewitt uses various types of testing equipment such as the air hose to conduce reliability testing of all aircrew flight equipment. (U.S. Air Force photo by Airman 1st Class Corey Hook)