On the night of 16-17 May 1943 nineteen Lancaster bombers from 617 Squadron headed for Germany. Their mission for which they had been trained under a cloak of absolute secrecy was to destroy the dams of the Ruhr Valley and in doing so cripple the Nazi industrial war effort. It was to become one of the most famous raids of WWII. For the first time acclaimed oral historian Max Arthur has gathered together the voices of the 'Dambusters' including Guy Gibson commander of the mission and Barnes Wallis who developed the iconic Bouncing Bomb. These voices tell of the hard training and sheer bravery that went into this legendary mission. We also hear from the German civilians who suffered the attack who speak of the devastation that was wrought in their lives. This was a raid like no other and in this extraordinary collection Max Arthur has created an enduring record of a unique event in British military history.