Tighten up
U.S. Air Force Senior Airman Jessica Burrell, 347th Operations Support Squadron aircrew flight equipment technician, tightens a set screw on an LPU-10/P life preserver April 15, 2015, at Moody Air Force Base, Ga. Tightening the screw on the flotation device ensures the carbon dioxide bottle stays in place, and prevents leakage. (U.S. Air Force photo by Airman Greg Nash/Released)