Airman 1st Class Royston Bedminster, 28th Maintenance Squadron nondestructive inspection technician, dips part of an actuator into penetrant liquid at Ellsworth Air Force Base, S.D., May 8, 2015. Penetrant testing is a cost effective method of detecting surface cracks, corrosion, scratches and other surface impurities that could hinder mission readiness of the B-1. (U.S. Air Force photo by Senior Airman Anania Tekurio/Released)