About 12 years ago I flew our Comanche 260 from Berlin Templehof to the Moehne Dam on the way back to UK and flew the drop route and then around the face of the Dam. You can still see by the different colour concrete where it was repaired. Then we landed at Arnsburg ( near the Dam and met an old guy who told us he was about 12 when the dam was breached. Apparently it was mother's day and everybody had been out to party's, so were still up quite late.