Passing the test
ELMENDORF AIR FORCE BASE, Alaska -- Senior Airman Vince Jacobs, 3rd Logistics Readiness Squadron, removes a test sample after performing a Stored Energy System (SES) purge. The purge allows Airman Jacobs and fellow fuel flight members to see if the SES is working properly on an F-22 Raptor. If the sample has more than 35 microns of contamination, it would ground the aircraft. (U.S. Air Force photo/Staff Sgt. Joshua Garcia)