Not exactly a bang-bang, shoot-'em-up pic, however, I admired Barnes Wallis' determination to develop the "bouncing bomb" used to blow up the dams.
I saw the documentary about this operation. It was as good as the movie!
One more note on "The Dam Busters." The real Guy Gibson, the RAF Wing Commander who led the raid on the Ruhr dams, was all of 25 years old when he planned and led that mission. Sadly, he died a year later while flying an RAF Misquito on a "pathfinder" mission over Holland.
The Dam Busters is one of my fav's too. (But then again I am an engineerr...)