The Dam Busters1955

Doctor B. N. Wallis, C.B.E., F.R.S.:
Do you know how much water it takes the Germans to make a ton of steel?

Doctor:
I haven't the least idea.

Doctor B. N. Wallis, C.B.E., F.R.S.:
One hundred tons. Now just look at this.

[gestures to a map on his desk]

Doctor B. N. Wallis, C.B.E., F.R.S.:
The whole of this great arsenal of war factories in the Ruhr depends for its water on three enormous dams. The Moehne. The Eder. And, the Sorpe. They control the level of the canals and supply a lot of hydroelectric power as well. When those are full they hold four hundred *million* tons of water. Just think of the chaos if we could break those walls down.