Obtained via thirds
As a rule, all pictures on this website were made by Hans Engels or Frank Klaassen (the webmasters of Thunderstreaks.com).
Yet, in the course of time we have collected a considerable number of slides and negatives that have been made by other collegue spotters/photographers. As a rule these slides/negatives have come to us through a network of foreign correspondents with whom we used to swop photographic material. Since we would like to share this material as well, we created this specific gallery.