An engineer X-Rays the wing of a B-17 Flying Fortress at an air service depot in Great Britain. Printed caption on reverse: 'ADVANCED USES IN X-RAY. At a service depot in Great Britain, this Flying Fortress, damaged on a mission over enemy territory, is examined with the aid of a portable Fluroscope to determine the extent of damage. The fluroscope is one of the many new X-Ray apparatus developed in the medical and industrial field. Acme Photo.'