US Air Force (USAF) AIRMAN First Class (A1C) Christopher Staley, 100th Maintenance Squadron (MXS), dips a hydraulic actuator into Remover (Concentrated Soap) to remove a fluorescent penetrator from the parts surface. This allows the remaining penetrator trapped in a crack to be seen under a black light. A1C Staley is assigned to the Non-destructive Inspection Shop, at Royal Air Force (RAF) Mildenhall, United Kingdom (UK)