It's a military action that's become a firm part of British History, as famous as Agincourt, Waterloo or Trafalgar.
It's the 75th anniversary of he Dambuster's raid on Dams in the German Ruhr valley.
And to mark the occasion, the 1955 film was screened in cinemas across the country last night.
And for Dr Hugh Hunt from the University of Cambridge, he had a very special cameo role.
The Engineer was demonstrating some of the science behind making bombs bounce.
You can watch a training run below
Dr Hunt was part of a special premiere for the movie, which had been remastered for the anniversary.
He took to the stage at the Royal Albert Hall to demonstrate how Barnes Wallis cracked the engineering conundrum.
His efforts were livestreamed into 400 cinemas across the country.
The screening also featured TV historian Dan Snow who talked about the history of the Royal Air Force's 1943 attack on the Mohne, Eder, and Sorpe dams in Nazi Germany.
Watch the Trailer for the event below
That wasn't the only tribute. At last night's League Two play-off between Exeter and Lincoln, fans paid their own respects to members of 617 squadron.
Of course, such is fame of the raid - it even became part of a popular ad campaign.