The production of heavy water was part of the German attempt to obtain for themselves the ultimate weapon, the atomic bomb.

This could have meant defeat for the allies, and was the conclusion of allied scientists who were also working intensely along different lines to produce an allied A bomb. At this time WW II was at its height and at a critical stage with all available stocks of heavy water being produced at Rjukan in German occupied Norway, it was imperative it was slowed or stopped at the first opportunity.