17th May 1943. Lancaster's from 617 Squadron deliver a surprise attack on the Ruhr dams with specially designed, unique bouncing bombs invented by Barns Wallis. Wing Commander Guy Gibson is shown drawing defensive fire away from Flt Lt Maltby's aircraft as it passes over the Mohne, just as his mine explodes and breaches the dam.

The Artist Proofs and Remarques are also signed by former Dambusters:
Flying Officer Raymond E. Grayston (Flight Engineer of AJ-N, Les Knights Lancaster.) and Squadron Leader George L. Johnson DFM (Bomb Aimer on AJ-T, American Joe McCarthy’s Lancaster.