At the beginning of the Second World War, Hitler ordered the Luftwaffe to take aerial photographs of Britain in preparation for an invasion. In 1945 British Intelligence discovered 16 tons of pictures in Bavaria, which were sent to Britain and classified top secret; but other Luftwaffe photographs were found and kept by ordinary servicemen. Here, Nigel Clarke presents approximately 200 such photographs, many with bomb runs marked, along with wartime images of the corresponding damage on the ground.