MARCH AIR RESERVE BASE, Calif. -- Senior Airman Jason Ray, a non-destructive inspection technician from Air Force Reserve Command's 452nd Maintenance Squadron, applies a magnetic particle bath to a KC-135 Stratotanker refueling aircraft brake plate at March Air Reserve Base, Calif. He is checking the brake plate for fatigue and cracks. (U.S. Air Force photo/Val Gempis)