Today is the 79th anniversary of the May 16, 1943 Dambuster raid using the bouncing bombs using 19 Lancasters in 3 waves. The oldest British airman was 27! Most were 21-23 year old. The flight briefing happened at 6 pm on this day.
They did not find out about their mission until this briefing. Many thought it was to bomb the Tirpitz or the U-Boat pens in France. At 6 pm they found out it was the 3 dams in the Ruhr Valley.
https://www.iwm.org.uk/history/the-incredible-story-of-the-dambusters-raid
I know this is really the responsibility of our TEMAC WW2 historian- Roger Mason-. :D
Frank