This document summarizes a presentation about the National Collection of Aerial Photography (NCAP) and its archive of aerial photographs. The NCAP collection includes photos of Edinburgh from 1951 and Cologne from 1943 and 1945. Key uses of declassified aerial imagery include locating unexploded ordnance. All photos in the collection are digitized and available online through the NCAP website at http://aerial.rcahms.gov.uk/.