The role of World War II aerial reconnaissance photography was the subject of a recent installment of PBS’s Nova. Colonel Lewis F. Powell must have used some of these photos in his work with the intelligence section of the U.S. Strategic Air Forces in Europe. This was a reminder, too, of the trove of captured German aerial reconnaissance photos from World War I in the John H. Tucker papers . An example can be seen here. For more on this see Terrance Finnegan’s Shooting the Front: Allied Aerial Reconnaissance in the First World War.