Quality Assurance
Staff Sgt. Ryan Walker, 28th Maintenance Group quality assurance inspector, performs a walk-around inspection on a B-1B at Ellsworth Air Force Base, S.D., Feb. 2, 2012. All operations on the flightline are monitored by quality assurance inspectors to ensure maintenance and support personnel complete their tasks safely and properly. (U.S. Air Force photo by Airman Alystria Maurer/Released)