The Dam Busters (1955)
As the title suggests, this bunch of dashing pilot types risk life and limb to bust dams. Germany's dams, to be precise. Based upon a real operation in WW2 that used the infamous bouncing bomb for the first time.
George Lucas famously used footage from the film for an early rough cut of the climactic Death Star battle in Star Wars – with many lines of dialogue in the final film sounding suspiciously familiar.
And Lord of the Rings director Peter Jackson is currently beavering away on a remake of the film, scripted by Stephen Fry.